Author: Zachary Durber
MDL-46662 grader: Improve course header and aggregation accessibility
Deprecated unused grader collapse icon function.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=2350b3f4537f6e59ba21ee597722785a397e3ed6
http://github.com/moodle/moodle/commit/2350b3f4537f6e59ba21ee597722785a397e3ed6
+ 2.9 en [aggregatesonly,core_grades]
+ 2.9 en [fullmode,core_grades]
+ 2.9 en [gradesonly,core_grades]
+ 2.9 en [showingaggregatesonly,core_grades]
+ 2.9 en [showingfullmode,core_grades]
+ 2.9 en [showinggradesonly,core_grades]