Git commits in Moodle 3.4.4 by Zig Tan

commit 282e6fe54d06c649d3ec49435269eb2595ef0f5d
Author: Zig Tan <zig@moodle.com>
Date:   Wed, 27 Jun 2018 15:50:31 +0800
Tag:    v3.4.4

MDL-44081 assign: Fix Grader annotation button accessibility ordering


commit ac8b6611c9455fe4fbdbc0f0161a61becee62966
Author: Zig Tan <zig@moodle.com>
Date:   Fri, 15 Jun 2018 10:10:59 +0800
Tag:    v3.4.4

MDL-61482 mod_assign: Clean html in offline grading CSV


commit c53170461f72b89b747d4e9cac5cc6b154d7abfa
Author: Zig Tan <zig@moodle.com>
Date:   Fri, 15 Jun 2018 09:46:29 +0800
Tag:    v3.4.4

MDL-58702 backup: Fix restoration of role mappings labels