Author: Huong Nguyen
MDL-87119 login: Improve the logout confirmation dialogue
http://git.moodle.org/gw?p=moodle.git;a=commit;h=53c1adfecaad7e5b8cbc4c969d22d0b68bdaee74
http://github.com/moodle/moodle/commit/53c1adfecaad7e5b8cbc4c969d22d0b68bdaee74
+ 5.2 en [logoutconfirmtitle,core]