Hopefully last fix update before 0.5 Version

- Fixed some issues during train station loading leading to errors, potentially snowballing into other issues.
- Fixed issue after changing roads for station with more than one Out Connections.
- Fixed issues caused by changing Road Station from layout options, disabled layout change for Ports.
- Fixed rail/road slope construction limits. 1 tile for roads, 1/2 tile for rail.
- Fixed Manual Road Connect sometimes not connecting roads properly.
- Fixed bridge ship navigation with the new spline bridge system.
- Fixed ship navigation layer display issue.
- Fixed Delete active station UI blocking if too many vehicles are referenced.
- Fixed city Construction Material UI counter not updating.
- Fixed VecTR truck trailer coupling issues.
- Some improvements to bridge collision, snapping, and autorotation during construction.
- Added tile highlight during bridge construction.