Git commits in Moodle 3.4.0 by Kathrin Osswald

commit 9cc55074d5355cf3e33fb0e0b8e1d2468f270c24
Author: Kathrin Osswald <kathrin.osswald@uni-ulm.de>
Date:   Fri, 20 Oct 2017 19:22:20 +0800
Tag:    v3.4.0-rc1

MDL-60522 message: Removed additional tooltips


commit 88d7f109a0975ac85107c501f904cd2738db8334
Author: Kathrin Osswald <kathrin.osswald@uni-ulm.de>
Date:   Thu, 07 Sep 2017 14:34:19 +0800
Tag:    v3.4.0-beta

MDL-60048 theme_boost: Center logo within the navbar


commit b3b938bfbc96e126cd78cc9a05b2a0f7cded085f
Author: Kathrin Osswald <kathrin.osswald@uni-ulm.de>
Date:   Sat, 01 Jul 2017 20:01:39 +0800
Tag:    v3.4.0-beta

MDL-59418 theme Boost: Improve visibility of maintenance warning