Checkmk Werk 12141: Fix missing navigation after automatic logout and login

ID: 12141 Title: Fix missing navigation after automatic logout and login Component: Multisite Level: 1 Class: Bug fix Version: 2.1.0i1 When users were automatically logged out, for example due to inactivity, they have to login again. After logging back in into the user interface, the navigation was missing in some cases. We ensure now that the navigation is visible to all users in such a situation.