Remove unwanted imports and functions
Fix tslint

Navigate to new content creation page when clicking on "Create new content"
Make ContentCreation component a component (not a MatDialog)
Add new routes to new pages

Added service handling local data. Use this service so we can change the used technology (cookie, local storage, ..) easily.

HTML: included join-room and room-list components

Add creator home screen component
Add creator home screen route

Add room component
Remove unused room logic from component
Add room route