Developer credits
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