fix failing unit tests, remove broken vehicle rotator tab

Author: LeftofZen

Core/Objects/WallObject.cs

@@ -26,7 +26,7 @@ public enum WallObjectFlags2 : uint8_t
 		NoSelectPrimaryColour = 1 << 0,
 		DoorSoundMask = 1 << 1,  // unused? only for rct2?
 		DoorSoundShift = 1 << 2, // unused? only for rct2?
-		IsOpaque = 1 << 3, // unused? only for rct2?
+		Opaque = 1 << 3, // unused? only for rct2?
 		Animated = 1 << 4, // unused? only for rct2?
 	};