Git commits in Moodle 3.5.2 by Kathrin Osswald

commit 1da4edbaf05035561ee524f5705904b497dad21b
Author: Kathrin Osswald <kathrin.osswald@uni-ulm.de>
Date:   Thu, 28 Jun 2018 15:49:21 +0800
Tag:    v3.5.2

MDL-59599 navigation: Improve activity status for nav nodes.