Author: David Mudrak
MDL-30006 Workshop / Accumulative grading: force graders to actually pick a grade
This patch introduces a new hidden field with the value "-1". The grade
selectors are compared with this values and must be greater than it.
This should fit well for numerical grades with the range 0..x and scale
items with the range 1..x.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=60a3e801f333e37eb5973b14abc2f70ffd851e84
http://github.com/moodle/moodle/commit/60a3e801f333e37eb5973b14abc2f70ffd851e84
+ 2.2 en [mustchoosegrade,workshopform_accumulative]