Git commits in Moodle 3.3.0 by Philipp Hager

commit 29df1cade1c0abf69bd3f589fde77a18994023d9
Author: Philipp Hager <office@phager.at>
Date:   Wed, 30 Nov 2016 00:59:15 +0800
Tag:    v3.3.0-beta

MDL-57198 course: add css-classes to restrictbygroup-button