async void MarkedInvTrans(ProductionOrderLineClient selectedItem)
        {
            busyIndicator.IsBusy = true;
            var      invTrans = new InvTransClient();
            OrderAPI orderApi = new OrderAPI(api);
            var      res      = await orderApi.GetMarkedInvTrans(selectedItem, invTrans);

            busyIndicator.IsBusy = false;
            if (res == ErrorCodes.Succes)
            {
                AddDockItem(TabControls.InvTransMarkedPage, new object[] { api, invTrans }, string.Format("{0}: {1}", Uniconta.ClientTools.Localization.lookup("InvTransactions"), invTrans._OrderNumber));
            }
            else
            {
                UtilDisplay.ShowErrorCode(res);
            }
        }