Author: Mathew May
MDL-66958 gradingform_rubric: Only save on form change
http://git.moodle.org/gw?p=moodle.git;a=commit;h=9769ba08b3b6c1bb47888bf19842b093606d9901
http://github.com/moodle/moodle/commit/9769ba08b3b6c1bb47888bf19842b093606d9901
+ 3.8 en [notset,gradingform_rubric]