CVS log for loncom/interface/statistics/lonstudentassessment.pm

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- For 2.11
  Backport 1.177

- For 2.11.4 (modified)
  Include changes in 1.175

- For 2.11.4 (modified)
  Include changes in 1.177

- Bug 5071
  - Align " / maximum" in total (rightmost) column for students with and without
    scores for selected folder(s).
  - Use 2 decimal places for maximum for consistency with total scores.

- For 2.11
  Backport 1.176

- Bug 6897

- Bug 6754 LON-CAPA as LTI Consumer
  - Grading screens can be used to display passback transactions, and
    for override of scores etc., for external tools set to be "gradable".

- For 2.11
  - Backport 1.174

- Internationalization: Added missing &mt() call
- Consistent standard styles: Error style for error messages

- For 2.11
  - Backport 1.173.

Exclude HTML tags from translation phrases.
Update corresponding German translation file phrases and translations.

- For 2.11
  - Backport 1.172.

XHTML:
- Escape parameter separators in links
- selected
- Removed invalid single quotation mark

- For 2.11
  - Remove another line added in 1.163 - requires "3.0" grading interface.

- For 2.11
  - Backport 1.170, 1.171

- Fix typo.

Use standard styles (info/warning/error):

- For 2.11
  - Reverse changes for 1.163 - they require "3.0" grading interface.

Localization of fields in Progress Chart (Assessment Overview Chart) for Excel output
    - Header with information about section, group, access status
    - Headline with student fields

(Excel output still needs global correction of character encoding.)

- Customization for MITrelate
  - Backport 1.168

- Bug 6244.
  - convert in-place from byte sequence to character needs to occur before
    calculation of length of all characters in string.

Bug #6244. Misalignment of names column in course assessment progress chart
if name contains special characters. Fixed by converting the byte sequence
to a utf character sequence. See perldoc utf8 for details.

Better layout of progress bar

Bug 6455 - Progress Indicator now jQuery. Still need to test across browsers.

- CHART now shows correct total possible points where folder is using
  randompick and all items included in folder carry equal points.

Add chart to grading

Status Bar:
Introduce optional parameter for lonhtmlcommon::Increment_PrgWin() to allow other counter steps than 1 (solves side effects of bug 6022 resolution).
Default is 1.

- Backport 1.161.

- Bug 6255.
  &Apache::locallocaltime() now used for header in HTML, Excel and CSV output.

- Backport 1.157, 1.160.

- Fix quotes.

Consistent screen ergonomics:
- First checkbox, then option text
- Removed special styles

Bug 6022 - Workaround:
Only update status each 5 rows instead of each row to get rid of disturbing additional line break generated by scripttag()

Localized various statistical printing texts
- Added &mt() calls
- Added missing phrases to de.pm, prepared phrases in zh.pm, updated phrases in es.pm
- Optimized some &mt() calls and adjusted corresponding translation file entries

- Consistent username:domain

 Fix quotes.

- Backport 1.153, 1.154, 1.155, 1.156.

- Moved "Generate Chart" button to last position at screen header
- Moved status bar between options and buttons
- Exclude status bar from &mt call
- Added error style to error message about missing navmap
- Localized time output in chart headline

Optimized previous/next buttons:
- Localization: Added missing &mt to button texts
- Consistent wording: username:domain
- Optimized buttons for the case that top/bottom of student list is reached:
    - Disabled corresponding button
    - Wording
- Added phrases to de.pm

Display status in separate line

- Removed <h1> which was used for informal text instead of headline
- Optimized &mt usage (quantization of student counter)
- Added missing &mt
- Added translation to de.pm

- Backport 1.152.

XHTML:
- Replaced
checked="1"
by
checked="checked"

- Optimized/Corrected white spaces

Saving my work on fractional score display.

Replaced style for summary tables with LON-CAPA standard table styles

- Localization: Added missing &mt() calls to warning and error messages
- Use standard style instead of hardcoded style for "No Course Data"

Resource and symb in links to encrypted resources included in CHRT (assessment progress chart) and also STAT (course assessment statistics) need to be encrypted if viewer does not an advanced role (i.e., TA role) to prevent access denied message when following link.

Wording: "CSV" (comma separated values) everywhere uppercase

- Localization: added &mt to statistic type headline and Show-links-in-new-window-option
- Set status field to readonly (only used for output)

- eliminating some log spew

- when errors occur getting data for chrt display it

Bug 4954.  Filter title changed from "Enrollment Status" to "Access Status".  Access Status selections in lonhtmlcommon set to:
Currently Has Access
Will Have Future Access
Previously Had Access
Any Access Status
See comment appended to bug 4954 for more information.
Documentation updated to include ability to selectively display students with future access.

- BUG#4906 chrt higlight colror switching

- hey lets link to help files we have (BUG#4892)

&Apache::lonnet::unescape -> &unescape
&Apache::lonnet::escape -> &escape

Adding groups filter to STATS functionality. New tables added (dom_course_groupnames and dom_course_studentgroups).

- update statistics calls to bread crumbs

- .task 'version' is really tries for them
- 'correct_by_override' is the normal stat of affairs for a .task

- update to make use of the moved functions

- <label>

Fix bug 4338: Links in the chart default to opening new windows, but
it's controllable by the users.

Previous commit worked only in IE; this should work in both.

When * is displayed on the chart, add code to make a pop-up-like thing
appear and show the real value for that cell.

- style police

Fix sequence performance to correctly compute scores with &compute_score.

Fix bug 4490; parts correct works when weight for the problem = 0;

Fix bug #4358.

Towards fixing bug 4508: Instead of just putting in a
SUM(start:end)
for the Total column, put in
IF(COUNT(start:end),SUM(start:end),"")

This will sum the scores up if there are any scores, but put a blank
string into the sum if there were no attempts at all. If the professor
then averages that column, this will much more closely match the
LON-CAPA-claimed average for the sequence.

Fix bug 4415: If it was going to display a negative number, "truncate"
it to 0. This means everything in the Parts Correct chart is either 0
or 1.

- some stat reports were not cleaningup the navmap cglobal which menat the course hashes weren't untied

Bug 2159: use 'd' to indicate a draft solution was saved.
Also changed to using 'u' to indicate an ungraded solution.
Updated help text.
Fixed buglet where lonstatistics::section_enrollment_description was called
with a bad parameter.

- update status bar in CHRT HTML output mode

- increasing the use of loncommon::get_env_multiple

- ENV -> env

lonstatistics.pm: Modified &section_and_enrollment_description to take a 'mode'
lonstathelpers.pm: removed &sections_description
lonstudentassessment.pm: Use &Apache::loncommon::create_text_file and
    &Apache::lonstatistics::section_and_enrollment_description.

lonstatistics.pm:Removed package variable @SelectedSections.
    Added &get_selected_sections
    Added &section_and_enrollment_description to provide a brief
        description of those students selected for statistics work
        (hopefully this descriptive line will make it in to bug reports).
Added &section_and_enrollment_description to all statistics pages
Replaced use of @SelectedSections with &get_selected_sections in statistics
    pages.

Bug 4004: Mis-aligned headings in tries output of chart.
Also minor code cleanups and reduction in debugging spew.

Updated to use loncommon::create_workbook.  Spreadsheets were slightly
modified to use formats.

Fix output of csv headers.

More work on getting chart to use navmaps.  Excel output works now.  CSV is
broken.

lonstatistics:Changed name of sequences_with_assessments to
selected_sequences_with_assessments AND fixed bug where it returned all the
sequences with assessments instead of just those selected by the user.
lonstudentassessment: Now call selected_sequences_with_assessments

html_initialized: Fix bug in computation of column widths.
   $res->parts returns a reference, not an array.

Reworking to use navmaps directly.  It compiles.  Most statistics pages
will not load. chart works for html output only, although the columns are
off and all sequences are selected regardless of what you say.  In short,
it needs work.  A lot of work.  Guess I'll be busy tomorrow.

Bug 3934 (sort of): HTML output of chart now shows $awarded*$weight even
when the student does not have a value set for resource.$part.solved and
resource.$part.tries.

- Excel Forumlas were not being rewritten properly
   For example if you have a formula of =SUM(H11:H11), for row 110 this was turning into
    =SUM(H1100:H11)

Bug 3390: When outputting number of attempts, indicate those who did not
get the problem correct by prepending '-' to the number.  Added
'non_html_notes' so I can warn the instructor about the negative values.

Chart now uses inline status display instead of opening a window.

Excel output: now use the proper formula for computation of the maximum
points per student instead of using the same formula over and over.

Fix bug in excel output where the sum of a sequence which contained only
one multi-part problem would only include the first part.

Mostly localization support.

- backport 1.104

Bug 3390 - report '.' in excel & csv output if the html symbol is '.'
(attempted but incorrect)

Added support for "Gradebook: Ability to add text to rep".
lonmsg.pm: Added &retrieve_instructor_comments
lonstatistics.pm: Added 'comments' field to student data selector.
lonaboutme.pm: Added anchor for comments section.
lonstudentassessment: Added output for "comments" column:
    html: link is included
    excel & csv: text is included, although excel has limits.

Make total sum adjust to width of total.

Bug 2193: Chart Excel needs maximum possible total for each student.

Bug: 2905: Heading missing in excel output of scores summary.

- backport 1.100

Bug 2895: Sorting the classlist lead to a blank page.  Should go in
version_1_1_X.

Fixed bug with truncating sums in chart instead of rounding them.
Added a space between the problem scores output and the sum for a
sequence.

Fix bug introduced in last commit to html_outputstudent.  Columns now line
up again.

Modified general behavior of sums: If the student has not attempted any
problem part in a sequence, they receive a sum of ' ' instead of '0'.
Modified &StudentTriesOnSequence and &StudentPerformanceOnSequence to return
a score of ' ' when appropriate.
Modified (csv|excel|html)_outputstudent to catch the modified return value.
Modified html_outputstudent and html_finish to compute statistics properly
(Now keep track of the number of students contributing to the statistics,
instead of the number not contributing).

Typos: "separate"

No longer translate before calling lonhtmlcommon::breadcrumbs
and lonhtmlcommong::add_breadcrumb.

Update to fix the columns on html output and to compute them properly when
there are html entities in the titles of the sequences.

Translate text passed in to &Apache::lonhtmlcommon::breadcrumbs and
&Apache::lonhtmlcommon::add_breadcrumb.

Modified to use &Apache::htmlcommon breadcrumb routines.

Modified to use &Apache::loncommon::define_excel_formats()

Added summary table to excel output.

Moved chart-specific code from lonstatistics to lonstudentassessment.
Reworked the width computation of chart to deal with the new output structure
and to fix Bug 2192 (titles too long in chart).

More accurately count the columns of the spreadsheet.

Major cleanup to output data code to simplify logic.  The changes are to
all output types (html, excel, and csv).  Only minor improvements should
be visible to the users.

Fix and cleanup excel output of scores summary and scores tries by being
explicit about which row we are in.

Improve spreadsheet output by adding formats and being more explicit about
where columns are (so errors will be less likely to cascade throughout the
sheet).

- backport 1.84

Bug 2721: skip problems which do not have any parts at all.

Fix bone-headed error which caused generation of xls output to die
(development bug only).

Bug 2628: This will address the bug with the formatting of the values
shown for the summary table.
Also improved the handling of 'score' cells in the Excel output in the
case where there is only one thing in the sequence.

Fix bug seen at conference: When producing excel output for courses which
have a folder containing one problem part, sums for the folder containing
the part are incorrect.  A must-have for the next 1.1.x release.

Removed reference to non-existant options in error text.  Can go in 1.1.x
without any problems.

Bug 2475: chart blows up on Excel output for some "Output Data" choices.
Fixed.  The issue was using Excel formulas when they were not defined.
Should be in 1.1 release.

Modified logic in StudentTriesOnSequence to address bug 2464.

Explicitly "use Apache::loncommon" even though we're using it everywhere...

Part of Bug 2139: Chart now has a "Grand Total" column output in the
Excel format.  The sums on all the sequences are done with formulas, so
changing a students grade on a resource will propagate to their total on
the sequence and in the course.  Should go in 1.1.

Localization of lonstudentassessment (chart).  And a little bit of the
new spreadsheet error reporting.

Use the new &Apache::loncommon::store_course_settings and
restore_course_settings subroutines to remember form settings.
lonstatistics.pm was changed to not parse the student enrollment status
form elements before calling the sub-module routines which present the
interface.  Now each of the sub-modules (statistics/*) must call
&Apache::lonstatistics::PrepareClasslist(); at the right time.

Added loncommon::chartlink to produce a link to the chart for a particular
student.
lonstudentassessment: Modified to support passing in of output format in the
query string.  Required for chartlink to work.

Minor name change in output data selector.

Simplify user interface.  After chatting with Felicia the following
changes have been made to the 'Output Data' selection:

'Scores' has been renamed 'Scores Per Problem'
'Scores Sum and Maximum' has been renamed 'Scores'
'Scores Sum' has been removed.
'Scores Summary Table Only' has been removed.
'Tries' remains the same
'Parts Correct and Maximums' has been renamed 'Parts Correct'
'Parts Correct' has been removed.
'Parts Summary Table Only' has been removed.

Removed means access to that option has been disabled.  Can be re-enabled
without trouble in response to the inevitable outcry.

Bug 2269: Chart should round 0.999999 to 1 and not display '*'.

- backport 1.69

Added loncoursedata::clear_internal_caches() and calls to it in
&lonstatistics::Gather_Student_Data (used by statistics),
lonstudentassessment.pm (chart), assesscalc.pm (spreadsheet).  Should
go into 1.0.2 if possible.

Make correct_by_scantron the same as correct_by_student in the chart.

Fix bug 2167, illegal characters in course names cause crashes when preparing
excel spreadsheets which use the course name as the name of the sheet.
Added Apache::loncommon::clean_excel_name to do the cleanups.

More paranoia about uninitialized variables in package.

Fix annoying bug where, depending on httpd, it would mistakenly assume you
were in 'single student mode'.  Good old package variables.....
Should go in 1.0.1 if possible.

- making CHRT links work (BUG#1884)

Return the students score instead of the problem weight.

More useful progress window messages.  Bug 1046.

This bombed on Apache restart.

Added <br /> after 'clear caches' button.
Fixed bad columns on scores display.

Interface changes - get rid of drop down box of reports.  Move
'Clear Caches' button to below chart/stat selection boxes.

Install and use chart help files.

Mostly cosmetic changes.
    Modified descriptions and order of @OutputDataOptions.
    Added subroutine to output long descriptions of @OutputDataOptions.
    Excised multi-sheet excel code that was disabled anyway.

Add call to lonnet::clear_EXT_cache_status to help us get up to date data.

Interface cleanups - 'Update Display' is no more.
"Generate Statistics" and "Generate Chart" buttons now appear below the
selection dialogs, obviating the need for explainatory verbage.
Added a brief instructional messages to the classlist display.
Cleaned up the output of just a table in the single student mode.

Portion of Bug 1664:  Chart now shows problem weight * partial credit.
A new selection box 'Output Data' was created to seperate the output
mode (html, excel, csv) from the data being output.
The variable $base indicates the base (tries or scores) for the data
being output.
Modified all major routines (initialize, outputstudent, finish) for
each output method (html, excel, csv) to deal with this new structure.
Excel output of raw scores or tries on each problem part is now allowed!
Created &StudentTriesOnSequence and rewrote &StudentPerformanceOnSequence
to return the tries and scores.

Add verbose column headings to csv output.

Trivial request by Mark Lucas to make the single student view more readable.

Bug 1251 - get the spacing right for sequences with 0/0.

Default to html without links as per John's suggestion today.
Any comments?

Bug 1470 - reimplement single student view in chart.
lonstatistics.pm:
  Changed handling of $curr_student, $prev_student, and $next_student.  Now
  assumed to be undef when they are not appropriate.
  Renamed 'StudentAssessmentStudent' form parameter to 'SelectedStudent'.
lonstudentassessment.pm:
  Added package variable $single_student_mode to flag the single student mode.
  Added hidden form parameter 'sort', to maintain sort key.
  Added &next_and_previous_buttons to present the user with 3 buttons:
	"previous student", "all students", and "next student"
  Added &SingleStudentTotal to output an html table with some statistics about
        the students performance.
  Modified &html_finish to call &SingleStudentTotal instead of
	&StudentAverageTotal if in $single_student_mode

Disable mentioning of the planned but unimplemented multi-sheet excel output.

Bug 1092: Added output mode for chart which puts in links for all assessments,
whether or not the student has made an attempt.

lonstatistics.pm:  Now checks the status of the student before loading them
   in to the @Students array.  The student status selection box is no longer
   a part of the main statistics interface (top line of the display).
lonproblemstatistics.pm and lonstudentassessment.pm have been modified to
   include the student status selector in their interface.

Add output of 'Maximum' "student" to list the maximum scores available on
the sequences when we output Excel.

Change name of output mode selection form element to avoid carry-over
from other lonstatistics forms.

Fixes bug where '.'s were not being generated.

If none of the students have any data, we get a division by zero when we
compute the average.  This is now detected and everything is right with
the world.

"Problem Sets" changed back to "Sequences and Folders" by request.

moved &get_sequences_to_show from lonstudentassessment.pm to
&Sequences_with_Assess in lonstatistics.pm.

Added summary table to html output.  Added new output mode to let instructors
get just the summary table, without all those pesky students.
Rewrote &StudentAverageTotal to implement this.

Added timestamp to html and csv output.  Already present in excel output.

Added csv download.  'scores','totals', and 'all' work wonderfully now.

Use lonhtmlcommon progress windows.

Renamed 'Sequences and Folders' to the more generic 'Problem Sets'
Changed method of determining output mode variables.  The globals
$output_mode, $show, and $show_links are now given values from the
hashes in the array @OutputOptions.
Fixed bug which caused the five student groupings to be off when a
student did not have any course data.
Added beginnings of multi-sheet excel file output.

Added some header information (course desc, sections listed, and date) to
excel files.

Added check for excel sheet name greater than 31 characters.
Added descriptions to the output options and &OutputDescriptions() to
print out the descriptions.

Implemented Excel output.  Should be pretty much done.  Two output modes.
One gives score and max possible for each sequence for each student.
Second gives only scores for each sequence for each student, saving columns.
Beginning to change output selector.

Big Changes:
   Started adding different output options.
   No longer begins computing before the user has made selections.

The code is being simplified to some degree and obfuscated in other ways.

Each output type has three subroutines associated with it: initialize,
outputstudent, and finish.  Function pointers are used (defaulting the output
mode to 'html').  Currently excel and csv output both result in
"Not Implemented".

Renamed &CreateTableHeadings to &html_initialize, &ChartOutputStudent to
&html_outputstudent, and added &html_finish.  Each of these routines was
changed to make it responsible for *all* html output of the chart, other than
the selection form.

Still remaining to be filled in are the routines for csv and excel output.

I did *NOT* rewrite the subroutines &CreateLegend and &StudentAverageTotal.
&StudentAverageTotal is not called at this time and will be rewritten.

Removed:
    &ShouldShowColumns
    &FindSelectedStudent
    &CreateColumnSelectors
    &CreateColumnSelectionBox
    &MaxSeqPr
    &StudentReport

Added:
    &ChartOutputStudent
    &StudentPerformanceOnSequence

Rewrote:
    &CreateTableHeadings
    &CreateInterface
    &BuildStudentAssessmentPage

Now use &Apache::loncommon::get_current_state() to get the chart data (see
    &ChartOutputStudent()).  Note this uses the symb-less call since we are
    most likely to process all the students data.

lonstatistics.pm:
   POD cleanups
   @SelectedSections is set when we read the classlist.
   Added variables $top_map, @Sequences, and @Assessments.  These are
      initialized by &PrepareCourseData($r).
   Added &PrepareCourseData($r) which is essentially a wrapper for
      &Apache::loncoursedata::get_sequence_assessment_data().
   Added &MapSelect() to output a <select> box for sequences.  Not tested.
   Added &SectionSelect(..) to output a <select> box for sections.  Tested.
   Added &DisplayClasslist($r) which displays a table of the current classlist
      that is sortable by each column.  Does not bother with 'update time' as
      this should not be an issue for the user.  Tested.
   Added call to &PrepareCourseData by the handler.
lonpercentage.pm, lonproblemanalysis.pm, lonproblemstatistics.pm,
lonstudentassessment.pm: modified to call &Apache::lonstatistics::SectionSelect
   instead of the method in lonhtmlcommon.pm.

POD updates.

Fixed bug #994, so we have in chart like the below:

  1) student1    111115212121     12/12   122221172111     12/12
  2) student2    11111*191221     12/12   211*112 3.21     10/12
....
 99) student99   1223224*7232     12/12   3145.1245***     11/12
100) student100  121123244241     12/12   213.132216*4     11/12


but still the following code in lonstudentassessment does not work!
my $out = '';
$out .= sprintf("%3d) ", $Count);
if($Count % 2) {
    $out .= '<bgcolor="#FFFFFF">';
} else {
    $out .= '<bgcolor="#505050">';
}

Regarding bug #1049 I revised chart slightly.
if you create a course and, before enrolling students, check CHRT.  The header of
the page comes with this mesage "No students enrolled or Please Select a student"

Fix bug 1149, which was a server crash due to division by zero.

Tried to fix bug #994 for coloring and numbering the chart rows.
It needs more work.

Fixed bug #880
lonstudentassessment.pm (chart) gives summary tables at the end of computing the course chart.
Let me know any feedback.

Fixed  bug 1070

Started to fix bug #880
It needs more work.

Fixed bug 1050: change the message correct by override into correct by hand grading or override
CV: ----------------------------------------------------------------------

cleaning the code.

Added a button 'Display without links' which will cause the chart to be
sent out without 8 gigabytes of links in it.  This is to deal with a problem
people have had with the chart - the page gets so large they cannot
copy and paste the data out of it without their browser/os/brain crashing.
Since the chart is appearantly used instead of the spreadsheet to assign
grades, making its output a little easire to parse is probably worthwhile.

started to fix a bug

try to fix some bugs.

Fixed Bug #752 to add total points to each homework set total

started to fix some bugs.

Fixed a little bit of remined in bug #805.

Fixed bug #805.

First, fixed a typo in lonstudentassessment.  Also, fixed the updating of
the statistics information if the resource tree changes.  Note, in
student assessment it will show up as a blank space unless an attempt
was made for that problem.

Still could not find out why the spacing is now off.  I did make it
so that students without course data display No course data instead
of a series of zeros.  I also made it so that sequences that had no
data didn't just display a zero at the end, but are now blank.

Fixed the problem where lonstudentassessment would not update after the
data had been downloaded once, even though the student had done more
work.  Now it updates properly.  Simply set the value to false instead
of checking to see if it was defined, since I define it if it true.  I
noticed the columns getting off a little now, so I will look at it next

First, added unescaping of $key in lond dump command.
Next, I added a new way to download student course data.  There are now
two functions for storing data, DownloadStudentCourseData and
DownloadStudentCourseDataSeparate.  These two functions base their running
on input parameters.  The option parameters are whether or not to check
the date for downloading, whether or not to store all the dumped data or
extract out the data you want, whether or not to display a status window.
The extracting data parameter will be best utilized if someone adds in the
ability to send a list of what parameters are desired and perhaps some simple
commands to affect how that data is processed, like tries, sum would
sum record the sum of all the tries for a student.  This is just an idea.

Currently, I have all the statistics modules using the extract ability.
This slightly increases in download time, but drastically reduces cache
size.  Possible ideas include pushing the extract to the lond side with a
list of parameter/commands, or even downloading everything to a temp cache,
then extract the necessary data into the cache then removing the temp
cache.  There are lots of other possibilities, which can change the download
time, cache size, and other factors.  Now, only loncoursedata handles the
downloading of data to a hash.

lonstudentassessment was changed slightly to remove ' ' as a link if the
student actually hadn't attempted the problem.

lonproblemanalysis was updated for the new str2hash type functions.  There
are a couple of (cludges/fixes) for it.  Depending on whether or not the
str2hash type functions are changed, these may or may not need to be
updated.

lonproblemstatistics was drastically overhauled.  Most of the processing
was removed.  Now, it just does its few statistics functions and outputs
the table.  Currently, I broke the graph, discussion column, and
discriminant factor columns.  These will be fixed on the next commit soon.
There is also no caching done.  This will also be remedied soon.  The
problem that will need attention with caching is to know when to update
the statistics cached data when a student's course data is updated.

Lastly, I plan to add perhaps a toggle legend display button, another graph
button(percentage correct), a button to send the CSV format(not just display),
and add a toggle button for sorting within a sequence and sorting all
the problems.

Also, I changed the look and feel to be the same as the class list page.
Also, the displaying of sequence headers and child sequences are not
working.  This will be fixed, but thought will be put into how best to
make it look and have a similiar fill for all the table combinations.

Added in some flushes and changed where some of the modules print.  Also,
fixed download all so that if you stop it, and then select something
else it won't continue to download.

First, added the parenthesis thing to the GDBM stuff.  Fixed the interface
problem statistics so that the buttons work correctly.  How the data
is interpretted is not finished.

For some reason, tieing to a hash inside of an if that ties the hash was
causing problems periodically.  I broke the two ties into sequential
commands.

Finished combining the chart and student assessment reports, except for
documentation.  The grade information is displayed like the chart, but
has more of an interface like student assessment.  Currently, all the
controls change onchange, except for student section and column
reselection multiselects.  These will be updated whenever another
interface button submits a form.

Added section selection.  I added a new multiselect box for sections.  All
students without a section number or a space or undefined will fall under
the none category.  A list of possible sections for a course will be displayed.
Only students with a section number matching one of the selected sections
will be selectable in the students menu and/or display their report.  If
the currently view student doesn't have the correct section when the section
selection changes, the student selection will revert to no student selected.

Note: To refresh the reports after changing which sections to display, press
the refresh button or any of the other onchange interface controls.

Updating lonstudentassessment to add in features of lonchart.  Now the
data display is like lonchart with formatted columns of data.  The next
step will be to add in the column removal check boxes and a multiselect
box for sections.

Broke lonstatistics up.  Now the bulk of the code that generate the
html pages for the different forms have there own module.  Some minor
modifications were necessary to accomplish this.

Also added default student selected on student assessment page is now
all students.  The full name links on the classlist page now take
you to the student assessment page with that student selected.  I
had forgotten to put the post data in the get_unprocessed_cgi
function call.