Git commits in Moodle 3.4.6 by Huong Nguyen

commit a49d2c334afe6d4883dc5d3c0ed4c5efa8bbe2b8
Author: Huong Nguyen <huongnv13@gmail.com>
Date:   Thu, 13 Sep 2018 15:15:52 +0800
Tag:    v3.4.6

MDL-63354 Group: Rollover text on long group names is not consistent