Author: Andrew Nicols
MDL-45635 javascript: Make core dialogue translatable
http://git.moodle.org/gw?p=moodle.git;a=commit;h=6c66c20107b4fa9a6b4beac28ddaf99564608e07
http://github.com/moodle/moodle/commit/6c66c20107b4fa9a6b4beac28ddaf99564608e07
+ 2.6 en [areyousure,core]
+ 2.6 en [closebuttontitle,core]
+ 2.6 en [unknownerror,core]