Git commits in Moodle 3.3.4 by Kathrin Osswald

commit f510295159979479f752f1937d3fd73082ebe9ff
Author: Kathrin Osswald <kathrin.osswald@uni-ulm.de>
Date:   Fri, 06 Oct 2017 18:20:35 +0800
Tag:    v3.3.4

MDL-60363 conditional activities: Dim the icon also in student's view.