Git commits in Moodle 3.9.4 by Shamim Rezaie

commit 7b96e8a4135763dbd0330609761499ea79dc1641
Author: Shamim Rezaie <shamim@moodle.com>
Date:   Thu, 10 Dec 2020 14:48:41 +0800
Tag:    v3.9.4

MDL-69301 theme_boost: Remove the special handling of Escape key


commit c0256a73512dc5d25fd6a69560ef4bbda1971a96
Author: Shamim Rezaie <shamim@moodle.com>
Date:   Fri, 06 Nov 2020 16:21:17 +0800
Tag:    v3.9.4

MDL-70072 core: Fix always displaying date in Gregorian


commit 8676a678888a88f2d54de28d8925ce1bd7a2de26
Author: Shamim Rezaie <shamim@moodle.com>
Date:   Thu, 17 Sep 2020 00:43:18 +0800
Tag:    v3.9.4

MDL-69301 course: Remove custom keyboard navigation code


commit 8af16c5709bc3ced1a39a2efdb5a64b6a9eed4a6
Author: Shamim Rezaie <shamim@moodle.com>
Date:   Wed, 16 Sep 2020 23:12:54 +0800
Tag:    v3.9.4

MDL-69301 core: Enhanced WAI-ARIA support for tab elements


commit 7f74dc1c16a38cd34eb4da87eef60f30825c2ab2
Author: Shamim Rezaie <shamim@moodle.com>
Date:   Wed, 16 Sep 2020 21:25:36 +0800
Tag:    v3.9.4

MDL-69301 theme_boost: convert aria.js to es6 module