Git commits in Moodle 3.8.x by Andrew Madden

commit 1ea3940c620b21c7765709ae00154e2a7c915eb2
Author: Andrew Madden <andrew.madden@live.com.au>
Date:   Fri, 30 Aug 2019 07:26:28 +0800
Tag:    v3.8.0-beta

MDL-65406 theme_boost: Add list markup to nav drawer for accessibility

commit 7599223a1cbb0bb69a7e6cae6148685777cabdb1
Author: Andrew Madden <andrew.madden@live.com.au>
Date:   Thu, 04 Jul 2019 09:49:46 +0800
Tag:    v3.8.0-beta

MDL-66032 badges: Prevent empty awarded badges criteria being created.

commit 907be50c4233727af4ee65c018b241450dc21c8a
Author: Andrew Madden <andrew.madden@live.com.au>
Date:   Tue, 18 Jun 2019 09:58:31 +0800
Tag:    v3.8.0-beta

MDL-65926 moodlelib: Convert username to lowercase prior to SQL query