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=86f1d1bb86afb8abc0a030b3e449e0aa0d9a83f6
http://github.com/moodle/moodle/commit/86f1d1bb86afb8abc0a030b3e449e0aa0d9a83f6
+ 3.3 en [deletecommentbyon,core]