Git commits in Moodle 3.6.7 by Stefan Topfstedt

commit 7f9e015071a4518e2e684ab916ced3fd1ead4e53
Author: Stefan Topfstedt <Stefan.Topfstedt@ucsf.edu>
Date:   Thu, 23 May 2019 07:54:13 +0800
Tag:    v3.6.7

MDL-66433 block_myoverview: tag courses as "hidden from students"