(svn r19347) -Add: Vehicle GUI now shows power, weight and tractive effort for road vehicles.

src/settings.cpp

@@ -791,6 +791,11 @@ static bool RoadVehAccelerationModelChanged(int32 p1)
 		}
 	}
 
+	/* These windows show acceleration values only when realistic acceleration is on. They must be redrawn after a setting change. */
+	SetWindowClassesDirty(WC_ENGINE_PREVIEW);
+	SetWindowClassesDirty(WC_BUILD_VEHICLE);
+	SetWindowClassesDirty(WC_VEHICLE_DETAILS);
+
 	return true;
 }