Git commits in Moodle 3.4.1 by Thinh Pham

commit 3fef39fc6846d90c2267c224742ac49ea1d7629d
Author: Thinh Pham <thinh.phamtien@nashtechglobal.com>
Date:   Tue, 19 Dec 2017 19:11:12 +0800
Tag:    v3.4.1

MDL-60079 User tours: leave unnecessary aria tags in the page