Git commits in Moodle 3.3.1 by Marcus Green

commit 7dc35ed9d23efd093d7eb71204610ebe72887d81
Author: Marcus Green <marcus@moodle.com>
Date:   Wed, 07 Jun 2017 21:53:53 +0800
Tag:    v3.3.1

MDL-58248 theme_boost: label/span for sidepanel expand button