Git commits in Moodle 3.4.5 by Kathrin Osswald

commit f3f44ad3d8c50adc1f3e54b9d5dede6aea387c7c
Author: Kathrin Osswald <kathrin.osswald@uni-ulm.de>
Date:   Thu, 28 Jun 2018 16:12:26 +0800
Tag:    v3.4.5

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