Git commits in Moodle 3.5.5 by Felice Candilio

commit 64d7b8788890cee2273fd8930289f9825b786687
Author: Felice Candilio <felicemcc@gmail.com>
Date:   Thu, 31 Jan 2019 18:03:02 +0800
Tag:    v3.5.5

 MDL-64649 amd: Removing underscores from icons in [Roles/Groups] forms