Git commits in Moodle 3.6.3 by Helen Foster

commit 9fb3f4ca1031e129c1482aa6ec4bf9aa74125e66
Author: Helen Foster <helen@moodle.org>
Date:   Fri, 01 Mar 2019 00:55:05 +0800
Tag:    v3.6.3

MDL-64943 lang: Import fixed English strings (en_fix)