Git commits in Moodle 3.2.4 by Josh Ebarvia

commit f3008f556c1e954df5334c2a6c72bf1d270730c0
Author: Josh Ebarvia <josh.ebarvia@blackboard.com>
Date:   Wed, 31 May 2017 14:46:23 +0800
Tag:    v3.2.4

MDL-49484 mod_lesson: Fix lesson page headers when editing

commit 4643358a5c1fc3d3f157f32c5fc6c04eb69905f1
Author: Josh Ebarvia <josh.ebarvia@blackboard.com>
Date:   Mon, 22 May 2017 11:39:03 +0800
Tag:    v3.2.4

MDL-49040 gradereport_grader: Fix feedback truncation after & char

commit b3ca553f3a689b8bbff25285f8fe0f8d47d79fab
Author: Josh Ebarvia <josh.ebarvia@blackboard.com>
Date:   Thu, 18 May 2017 13:08:36 +0800
Tag:    v3.2.4

MDL-51691 assignsubmission_feedback: Fix delete comments

commit 5607f04f159bdcd7c035830613eb1e67a8ec9399
Author: Josh Ebarvia <josh.ebarvia@blackboard.com>
Date:   Wed, 03 May 2017 12:08:38 +0800
Tag:    v3.2.4

MDL-58795 gradereport_grader: Prevent duplicates in grader report