Call prepareEditWindow instead of addEditWindowIfNecessary

This is the same that it's done when creating a order and editing a
order.

FEA: ItEr64OTS03PlanificacionHaciaAtras

navalplanner-webapp/src/main/java/org/navalplanner/web/orders/OrderCRUDController.java

@@ -175,7 +175,7 @@ public class OrderCRUDController extends GenericForwardComposer {
         showOrderElementFilter();
         showCreateButtons(false);
         orderModel.prepareCreationFrom(template);
-        addEditWindowIfNecessary();
+        prepareEditWindow();
         showEditWindow(_("Create order from Template"));
     }