V. 2.1.0

2.1.0:

- Added use center distance property for prefab lines, to for example align streetlamps on both sides of the road 

- Added end mode to prefab lines to determine when to place the last prefab. Never does not place prefabs beyond the end point. Round only does it if the prefab's center is before the end point whilst Always places all prefabs that start before the end point

- Creating a prefab line now automatically selects the add points mode

- Creating a road system now automatically selects the create road mode

- Added controls foldout to prohibited area inspector

- Removed controls foldout for the road and prefab line inspectors as all actions are done with the buttons in the toolbar

- Removed compatibility with older Unity versions (2020.3 or later is now required)

- Fixed loading a road preset with prefab lines not applying the prefab lines

- Fixed adding second prefab line point creating the point in the wrong direction

- Fixed prefab line y-offset property being available even when deforming to terrain is enabled

- Fixed points not drawing correctly when creating the first road in a road system

- Minor fixes

- Code cleanup