Git commits in Moodle 3.10.4 by Helen Foster

commit 23f0d09ec70bc5f95de3278a7e375e4b3498b82a
Author: Helen Foster <helen@moodle.org>
Date:   Tue, 04 May 2021 22:48:21 +0800
Tag:    v3.10.4

MDL-71425 lang: Import fixed English strings (en_fix)