Author: Ryan Wyllie
MDL-60062 quiz: add support for drag drop of calendar events
http://git.moodle.org/gw?p=moodle.git;a=commit;h=9aac9f70748c016419cc037d5213d643a1e8d2e2
http://github.com/moodle/moodle/commit/9aac9f70748c016419cc037d5213d643a1e8d2e2
+ 3.4 en [openafterclose,mod_quiz]