Author: Stevani Andolo
MDL-84824 core_message: Fixed popup accessibility issue
http://git.moodle.org/gw?p=moodle.git;a=commit;h=447b50e660d99fe2f07e45b76815d5e5b5014e3f
http://github.com/moodle/moodle/commit/447b50e660d99fe2f07e45b76815d5e5b5014e3f
+ 4.5 en [notificationsmarkedasread,core_message]