Git commits in Moodle 3.9.x by Dongsheng Cai

commit f64e54a2f3e33a59d668e032aa8406f6200ba85d
Author: Dongsheng Cai <d@tux.im>
Date:   Tue, 26 Oct 2021 02:37:39 +0800
Tag:    v3.9.12

MDL-71239 calendar: disallow manager role users edit user events


commit 20403e0e438033e3490b253d5015fd8bb0d639d2
Author: Dongsheng Cai <d@tux.im>
Date:   Tue, 06 Jul 2021 14:55:21 +0800
Tag:    v3.9.8

MDL-71978 core_calendar: only allow owner to edit user subscriptions


commit 737682c7509222d3fec3d5c157684ed6ba833c9b
Author: Dongsheng Cai <d@tux.im>
Date:   Wed, 14 Apr 2021 20:44:43 +0800
Tag:    v3.9.7

MDL-68747 mod_quiz: force LTR for quiz grading overview chart


commit 2410df1fd2d4c0ec2fe31a52b7dfd5e4f80026b8
Author: Dongsheng Cai <d@tux.im>
Date:   Thu, 08 Apr 2021 20:38:42 +0800
Tag:    v3.9.7

MDL-69956 forum: throw exception when advanced grading is not ready