#8: First setup of custom permission evaluator
#8: Role domain definition
#8: Implemented role domain and generated default roles Administrator and Site Administrator
#8: Site role first implementations
#8: Visualize user roles in user detail view
#8: Role management in users tab
#8: Better backend for role assignments
#8: Hide visual elements for non authorized users
#8: PreAuthorizes
#8: Working authentication with admin
#8: Moved PreAuthorize to annotations
#8: Finalization and fintetuning
Merge branch 'feature/#8-site-admins' into develop