Author: Michael Hawkins
MDL-61973 editor_atto: refactoring media icons
http://git.moodle.org/gw?p=moodle.git;a=commit;h=910b62a3d0f72c7396bc70bd1f1f65e7cdd86092
http://github.com/moodle/moodle/commit/910b62a3d0f72c7396bc70bd1f1f65e7cdd86092
+ 3.5 en [pluginname,atto_image]
+ 3.5 en [pluginname,atto_media]
+ 3.5 en [audiortc,atto_recordrtc]
+ 3.5 en [videortc,atto_recordrtc]