Author: Ryan Wyllie
MDL-59922 mod_choice: allow editing of open and close events
http://git.moodle.org/gw?p=moodle.git;a=commit;h=c35613ff281ad9e8a405356b5cca82ba6c9df04e
http://github.com/moodle/moodle/commit/c35613ff281ad9e8a405356b5cca82ba6c9df04e
+ 3.4 en [openafterclose,mod_choice]