(svn r14395) -Fix [FS#2285]: crashes and GUI desyncs when order is deleted/modified while the timetable window is open

-Fix: close any dropdown and child windows in the Order and Timetable windows when selected order is deselected, deleted, ...

src/vehicle_base.h

@@ -657,6 +657,19 @@ static inline Order *GetVehicleOrder(const Vehicle *v, int index)
 	return order;
 }
 
+
+/** Returns VehicleOrderID of selected order */
+static inline VehicleOrderID GetVehicleOrderID(const Vehicle *v, OrderID order)
+{
+	VehicleOrderID ret = 0;
+
+	for (const Order *o = v->orders; o != NULL; o = o->next, ret++) {
+		if (o->index == order) return ret;
+	}
+
+	return INVALID_VEH_ORDER_ID;
+}
+
 /**
  * Returns the last order of a vehicle, or NULL if it doesn't exists
  * @param v Vehicle to query