Author: Andrew Nicols
MDL-44761 editor_atto: Add keyboard shortcut descriptions to the button titles.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=d86e45f0ce988e0856c453ce3fbee81594681e7b
http://github.com/moodle/moodle/commit/d86e45f0ce988e0856c453ce3fbee81594681e7b
+ 2.7 en [editor_command_keycode,editor_atto]
+ 2.7 en [editor_control_keycode,editor_atto]
+ 2.7 en [plugin_title_shortcut,editor_atto]