Peter/tilt

- Adds resume button when the user scrolls away
- Adds tilt on default during routing
- When the user tilts the map during routing that tilt will stay consistent through out the rest of routing. 
Already defined in `RouteFragment.ROUTE_ZOOM_LEVEL`. Should only be defined in one place.
Maybe here is a better place for these type of constants? In which case the other declaration should be removed.