Changelog:
-Fixed tires starting to bounce after being repaired in multiplayer
-Improved how bridges are generated to reduce bumps
-Fixed/improved thumbnail lighting
-Fixed moving/rotating/scaling props not invalidating laps in track builder
-Fixed prop scaling using wrong pivot when scaling one prop
-Fixed not being able to shift rotate some props
-Fixed prop tool not remembering lastly placed prop's rotation
-Prop curve indicators are now disabled when tool is not active