Author: Marty
MDL-69723 assign: Add # need grading to summary
For teachers viewing the assignment summary (/mod/assign/index.php),
it shows a '-' in the 'Grade' column. Instead of showing a '-', display
the number of items that need grading.
Augment by creating a link to the grading page so that teachers can see
the outstanding assignments more quickly.
Also attempted to write phpunit tests that verify values for ungraded
submissions for teachers.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=424fecb7b0d6533a1916b6b714115787d431e4a4
http://github.com/moodle/moodle/commit/424fecb7b0d6533a1916b6b714115787d431e4a4
+ 4.0 en [numberofsubmissionsneedgradinglabel,mod_assign]