Git commits in Moodle 2.8.3 by Nivedita Setru

commit 542db0f6fe574ffce31b4083f9c5eef2347cbe31
Author: Nivedita Setru <n.setru@ucl.ac.uk>
Date:   Wed, 14 Jan 2015 10:28:22 +0800
Tag:    v2.8.3

MDL-48073 enrol: Fixed group filter resetting erroneously.