Git commits in Moodle 3.11.x by John Yao

commit 4f998e50044318a74bd80519e781bb059727c8f1
Author: John Yao <johnyao@catalyst-au.net>
Date:   Thu, 14 Jan 2021 14:19:08 +0800
Tag:    v3.11.0-beta

MDL-70627 filters: aarch64 mimetex type support for filter tex notation

commit 738449323a2377714bd35c3a55c92987cd47ef1b
Author: John Yao <johnyao@catalyst-au.net>
Date:   Thu, 19 Nov 2020 09:36:32 +0800
Tag:    v3.11.0-beta

MDL-67636 gradebook: Prevent exposing hidden grade in locked category

commit 1a013d3feef30850c08a4dceb6f9217fa95bd9bb
Author: John Yao <johnyao@catalyst-au.net>
Date:   Thu, 19 Dec 2019 10:41:32 +0800
Tag:    v3.11.0-beta

MDL-65390 accessibility: correct focus after "Show more" clicked