Git commits in Moodle 3.9.3 by Luca Bösch

commit a22b74872c5ba760feaab082caae81e79c542432
Author: Luca Bösch <luca.boesch@bfh.ch>
Date:   Thu, 22 Oct 2020 05:24:42 +0800
Tag:    v3.9.3

MDL-69995 backup: padding before activity icons.


commit 01f3495a464ecf84a6b2a85e1b82ef0e0fdf6429
Author: Luca Bösch <luca.boesch@bfh.ch>
Date:   Fri, 16 Oct 2020 06:25:57 +0800
Tag:    v3.9.3

MDL-37226 assign: align select all header checkbox


commit 7961a36b762eefa1df5b5bfbee06833fbf311810
Author: Luca Bösch <luca.boesch@bfh.ch>
Date:   Thu, 15 Oct 2020 13:33:42 +0800
Tag:    v3.9.3

MDL-69945 core_calendar: let circles appear as circles