Git commits in Moodle 3.9.2 by Nathan Nguyen

commit 84ef6eb8d9c16f3c3fd1dfd033292992840aba20
Author: Nathan Nguyen <nathannguyen@catalyst-au.net>
Date:   Mon, 13 Jul 2020 15:58:29 +0800
Tag:    v3.9.2

MDL-67468 filter_activitynames: use MUC


commit 563cfa0e1e530edbea73a9c51ed18cc5c50812ce
Author: Nathan Nguyen <nathannguyen@catalyst-au.net>
Date:   Tue, 12 May 2020 14:21:56 +0800
Tag:    v3.9.2

MDL-68680 core_grades: check grade item before trigger delete event