Developer credits
Git commits in Moodle 3.2.x by Helson Castro
commit 8ea5d72218c663afbe206ec5bed27070021963e6 Author: Helson Castro <helsonaraujo@hotmail.com> Date: Fri, 27 Jan 2017 13:55:07 +0800 Tag: v3.2.2 MDL-57568 forms: Added missing include for button element.