Git commits in Moodle 3.9.0 by Ruslan Kabalin

commit a38e1d49684eec37d773bc272ee74f8c8bb5d769
Author: Ruslan Kabalin <ruslan.kabalin@gmail.com>
Date:   Tue, 12 May 2020 21:29:00 +0800
Tag:    v3.9.0-beta

MDL-67548 core_course: Add unittests covering category deletion hooks.

commit 27b29b29962b8291880a939134a6f4a260047d6b
Author: Ruslan Kabalin <ruslan.kabalin@gmail.com>
Date:   Wed, 06 May 2020 16:43:42 +0800
Tag:    v3.9.0-beta

MDL-67548 core_course: Reflect content move category in deleted event.

commit 50bf320f4d4ea9c600fbe1b967045337571c9591
Author: Ruslan Kabalin <ruslan.kabalin@gmail.com>
Date:   Mon, 04 May 2020 04:02:30 +0800
Tag:    v3.9.0-beta

MDL-68592 formslib: Fix inline layout for nested groups

commit 4993775900e0ae3aa025c8a03638f2d136d9dd08
Author: Ruslan Kabalin <ruslan.kabalin@gmail.com>
Date:   Sat, 02 May 2020 23:02:51 +0800
Tag:    v3.9.0-beta

MDL-68583 core_course: Fix category delete action menu.

commit 72316a9f4eaf33ed5cbdacc79a4cb53971e74bc1
Author: Ruslan Kabalin <ruslan.kabalin@gmail.com>
Date:   Sat, 02 May 2020 01:00:40 +0800
Tag:    v3.9.0-beta

MDL-67548 core_course: Add more category deletion hooks.

commit 39e777e3f7c27b75aee4dd688611d4bbfcca35b5
Author: Ruslan Kabalin <ruslan.kabalin@gmail.com>
Date:   Sat, 02 May 2020 00:19:55 +0800
Tag:    v3.9.0-beta

MDL-67548 core_course: Remove category deletion form artefact.

commit 52a268a09d0c3061b8ae2fccc623e986026e339b
Author: Ruslan Kabalin <ruslan.kabalin@gmail.com>
Date:   Thu, 02 Apr 2020 21:11:37 +0800
Tag:    v3.9.0-beta

MDL-68315 formslib: Fix completion attribute in course form element.