Order hold (#515)

* Add support for "ON_HOLD" status for orders

* Bump version and release notes

* Fix import

lib/widget/order/purchase_order_detail.dart

@@ -163,7 +163,6 @@ class _PurchaseOrderDetailState extends RefreshableState<PurchaseOrderDetailWidg
       acceptText: L10().cancel,
       onAccept: () async {
         await widget.order.cancelOrder().then((dynamic) {
-          print("callback");
           refresh(context);
         });
       }