Move AKModel views into several subfiles to improve overview and resolve problems with circular imports
Introduce new modular status page handling (widgets and views)
Port main status page to new structure
Move AK messages status page visualization to AKSubmission (therefore, they automatically do not show up when there is no possibility to create them)
Introduce status widget for virtual rooms
Fix timezone issue for rendering of AK messages on status page
Adapt status page URL in several views and tests

Attach status view to event model admin
Link from admin start page
Customize admin interface headers
Update translations

This is the base for custom admin views (with admin design and permission checking)
Replace default admin site with custom admin site in AKModel
Use custom admin index template & apply first basic change
Introduce custom admin base template (including bootstrap loading)
Introduce Mixin for AdminViews