Git commits in Moodle 3.4.x by Nathan Nguyen

commit edbc4b5816d52c2b468901cb1909ce837286ec72
Author: Nathan Nguyen <nathannguyen@catalyst-au.net>
Date:   Mon, 20 Aug 2018 10:56:34 +0800
Tag:    v3.4.6

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