Add: Apply rail/road type conversion when NewGRFs are updated mid-game.

This will update the rail/road type of tiles on the map, taking account of tram state, if types are moved around.

src/saveload/afterload.cpp

@@ -3362,6 +3362,7 @@ void ReloadNewGRFData()
 	RecomputePrices();
 	/* reload vehicles */
 	ResetVehicleHash();
+	AfterLoadLabelMaps();
 	AfterLoadVehiclesPhase1(false);
 	AfterLoadVehiclesPhase2(false);
 	StartupEngines();