DeliveryAdminWindow: 'Activate()' window after awaiting doc.Print(2)

Elwig/Windows/DeliveryAdminWindow.xaml.cs

@@ -794,6 +794,7 @@ namespace Elwig.Windows {
                     doc.Show();
                 } else {
                     await doc.Print(2);
+                    Activate();
                 }
             }
             FinishButton.Cursor = null;