Git commits in Moodle 3.2.x by Philipp Hager

commit d0d8a7f984f1c8ca0936af3503acc17bf997e9b1
Author: Philipp Hager <office@phager.at>
Date:   Wed, 30 Nov 2016 00:59:15 +0800
Tag:    v3.2.1

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