Fixed saved voucher recalculation.

closes #278

shop/shopservice.cpp

@@ -247,6 +247,11 @@ void ShopService::moveItems(QList<VoucherItemPtr> items, VoucherPtr source, Vouc
     {
         erase(source);
     }
+    else
+    {
+        calculate(source);
+        update(source);
+    }
 
     tx.commit();
 }