Author: Jake Dallimore
MDL-35980 comment: add comment info to delete button for screen readers
For each delete button in the comments widget, make the spoken text a
string containing the name of the poster and the datetime.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=3bf7fdb1e8fe8a263e39aec1b921b90415a4a819
http://github.com/moodle/moodle/commit/3bf7fdb1e8fe8a263e39aec1b921b90415a4a819
+ 3.1 en [deletecommentbyon,core]