Git commits in Moodle 3.1.x by Marc Català

commit 4bb846903894db69783af76f63954c3eb959566e
Author: Marc Català <reskit@gmail.com>
Date:   Thu, 06 Oct 2016 19:38:59 +0800
Tag:    v3.1.3

MDL-56300 mod_assign: Filtering students throws a javascript error