Git commits in Moodle 3.11.3 by Frédéric Massart

commit c1b68bf712c30bbd7e96fd0cd15915ed6db800e1
Author: Frédéric Massart <fred@branchup.tech>
Date:   Thu, 05 Aug 2021 13:42:08 +0800
Tag:    v3.11.3

MDL-72286 editor_atto: Declare type on plugins button groups