Author: Mark Nelson
MDL-54687 core_message: added ability to toggle between tabs
http://git.moodle.org/gw?p=moodle.git;a=commit;h=9aa012b5a15ec85049483d649296fd894a3dbe58
http://github.com/moodle/moodle/commit/9aa012b5a15ec85049483d649296fd894a3dbe58
+ 3.2 en [loading,core_message]