Bugfixes for mobile

* unify controls bar, remove duplicate from user management @blizzz @raghunayyar 
* fix apps without app-navigation, like Pictures @icewind1991
* slight transparency for controls bar for more open feel	, fix https://github.com/owncloud/core/pull/8839 @nickvergessen 
* fix left padding of controls bar for apps without navigation

Please review @owncloud/designers