Git commits in Moodle 2.9.3 by Jan C. Dageförde

commit 12621418bdeea37b2e2fcf845c36502bbd851172
Author: Jan C. Dageförde <jan.dagefoerde@ercis.uni-muenster.de>
Date:   Wed, 07 Oct 2015 13:54:12 +0800
Tag:    v2.9.3

MDL-51679 course: Update groupmode CSS class