Initial work on new student grades page.

This replaces the Grades page for students with a new layout
designed for students. The old grades table is still available
to instructors under "Student Progress". Being a grade page
for students, instructors see the same info a student would
(no hidden sets or grades are shown for instructors acting as
a student). The only difference for an instructor is the student
navigation menu is shown to switch which student to act as.

The assignments are split into categories. Open assignments,
reduced scoring assignments (if reduced scoring is enabled),
recently closed assignments (if achievement items are enabled
and these are assignments closed less than two days ago in
which an extension item could be used on), and closed assignments.

Currently assignments are all ordered alphabetically in each
category (this could be changed by sorting the list, but has
not been done at this time).

The total grade, if configured to be shown, is shown at the
top of the page for all sets that are past the open date.

All open, reduced scoring, and recently closed assignments
have their grade marked as either complete, the grade can
no longer be improved due to no more attempts left or the
student has answered all the questions correctly, or incomplete.
This is so students can identify which assignments they can
improve the grade or use an achievement item on to improve
the grade if recently closed. Currently tests do not show
this information (this could be added).

Each assignment is a list item which shows the total score
(for tests it shows the best test version score if the student
can see the score). Then for assignments it shows a table
which includes the total score and status for each problem
in the set. For just in time, only top level problems are
shown. For tests, each test version is shown, and then each
test version has a table showing the score and status of
each problem.

The old Grades page code is moved into StudentProgress.pm
where it is still used.

This is only the initial work to create a new grades page,
there is still work to do in terms of formatting of the
page, what is shown, ordering of the page, and anything else
that comes up during review of the new page.

Author: somiaj

assets/pg/myNewProblem.pg

@@ -0,0 +1,13 @@
+## no critic (PG::RequireMetadata)
+DOCUMENT();
+loadMacros(qw{
+    PGstandard.pl
+    PGML.pl
+    PGcourse.pl
+});
+
+BEGIN_PGML
+Blank Problem
+END_PGML
+
+ENDDOCUMENT();