Co-op fixes

This update fixes several co-op issues:
- Items no longer stay at their original spot on a guest's screen after being loaded.
- Passengers no longer get left far from the vehicle after getting in.
- Fixed being unable to enter vehicles when the prompt was showing.
- Reduced passenger camera stutter.
- The Pickup is now the recommended first vehicle.

Still seeing a problem? Please tell us in the Steam Discussions.