Git commits in Moodle 3.8.x by Trisha Milan

commit ff649d7bd47bd42521eb01a1abde39f0c66a9513
Author: Trisha Milan <trishamilan@catalyst-au.net>
Date:   Thu, 11 Apr 2019 13:51:59 +0800
Tag:    v3.8.0-beta

MDL-65310 block_timeline: Hide activities without due date