Git commits in Moodle 2.8.8 by Andrew Hancox

commit 0f8a6256d51c1db5cbe4456658245a1222bbff47
Author: Andrew Hancox <andrewdchancox@googlemail.com>
Date:   Thu, 02 Jul 2015 00:36:28 +0800
Tag:    v2.8.8

MDL-48970 groups: Fix hover description on groups overview page