Git commits in Moodle 3.6.0 by Nathan Nguyen

commit 923641f71ce213f8f793550a16373652ee976431
Author: Nathan Nguyen <nathannguyen@catalyst-au.net>
Date:   Mon, 20 Aug 2018 10:56:34 +0800
Tag:    v3.6.0-beta

MDL-62319 Assign: Grading interface is broken when using iOS 11.3 devices