Git commits in Moodle 2.7.8 by John Okely

commit afa1a8e3fb790f057ea297ec91a66280b4079c7b
Author: John Okely <john@moodle.com>
Date:   Fri, 24 Apr 2015 14:37:45 +0800
Tag:    v2.7.8

MDL-49848 message: Make messaging interface responsive