Git commits in Moodle 3.3.1 by Cameron Ball

commit a4eaa35e23178e444cd83288479aad67e8f80efd
Author: Cameron Ball <cameron@moodle.com>
Date:   Fri, 19 May 2017 15:08:05 +0800
Tag:    v3.3.1

MDL-58994 core_calendar: Coalesce event sort field


commit cb495b995ca66fb3c45f054de35657326b176528
Author: Cameron Ball <cameron@moodle.com>
Date:   Tue, 09 May 2017 15:04:55 +0800
Tag:    v3.3.1

MDL-58841 mod_assign: Style "view all" link on grading summary


commit 660182a1720d1d7be93ad8adf594d08db3d43e94
Author: Cameron Ball <cameron@moodle.com>
Date:   Fri, 28 Apr 2017 12:06:25 +0800
Tag:    v3.3.1

MDL-58496 mod_chat: Update timesort when updating timestart