Author: Thong Bui
MDL-74505 Question bank: Update validation editing question form.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=0b31712cf4af4fe89ec579226f1428110e349c3b
http://github.com/moodle/moodle/commit/0b31712cf4af4fe89ec579226f1428110e349c3b
+ 4.0 en [nopermissionedit,core_question]