Merge branch 'tracerestrict-sx' into jgrpp

# Conflicts:
#	src/train_cmd.cpp

src/train_gui.cpp

@@ -50,6 +50,7 @@ void CcBuildWagon(const CommandCost &result, TileIndex tile, uint32 p1, uint32 p
 		/* put the new wagon at the end of the loco. */
 		DoCommandP(0, _new_vehicle_id, found->index, CMD_MOVE_RAIL_VEHICLE);
 		InvalidateWindowClassesData(WC_TRAINS_LIST, 0);
+		InvalidateWindowClassesData(WC_TRACE_RESTRICT_SLOTS, 0);
 	}
 }