Git commits in Moodle 3.4.0 by David Castro

commit 4e52eb8eb0c5817ab32ce2ca6918a911197686e8
Author: David Castro <david.castro@blackboard.com>
Date:   Fri, 27 Oct 2017 03:55:06 +0800
Tag:    v3.4.0-rc1

MDL-60605 assignment: Added some styles to fix spacing in YUI file tree