Git commits in Moodle 3.3.5 by Huong Nguyen

commit a1a04839eb1117c3a01cf9acddb5dbe1b653bdcf
Author: Huong Nguyen <huongnv13@gmail.com>
Date:   Mon, 29 Jan 2018 11:06:23 +0800
Tag:    v3.3.5

MDL-60077 User tours: pop-up triangle look bad next to the corners