Author: Andrew Nicols
MDL-67544 mod_forum: Add missing aria label for discussion actions
http://git.moodle.org/gw?p=moodle.git;a=commit;h=92c23c26b22d48a1aa5e250a11da6570f3e5f5c7
http://github.com/moodle/moodle/commit/92c23c26b22d48a1aa5e250a11da6570f3e5f5c7
+ 3.9 en [togglediscussionmenu,mod_forum]