Git commits in Moodle 3.3.5 by KietLy

commit da908a84c3284009b246bfbdace577a8ba667517
Author: KietLy <Kiet.LyChan@nashtechglobal.com>
Date:   Thu, 28 Dec 2017 14:12:55 +0800
Tag:    v3.3.5

MDL-60078 User tours accessibility: Tab should go back into the pop-up