Git commits in Moodle 3.3.3 by Adam Olley

commit 3ff2f2d474d7e046a634fd354632a9e2092bcb9e
Author: Adam Olley <adam.olley@blackboard.com>
Date:   Tue, 03 Oct 2017 07:46:18 +0800
Tag:    v3.3.3

MDL-60320 icons: Use PNG icons as the preview thumbnails