sale now rolls back to olda data when it cant update the price

client/ticket/src/sale/index.html

@@ -228,7 +228,7 @@
                 label="Price"
                 model="$ctrl.editedPrice"
                 type="text"
-                accept="$ctrl.updatePrice()">
+                on-change="$ctrl.updatePrice()">
                 <t-right-icons>
                     <span class="filter">€</span>
                 </t-right-icons>

client/ticket/src/sale/index.js

@@ -309,6 +309,9 @@ class Controller {
         this.$http.post(`/ticket/api/Sales/${id}/updateQuantity`, {quantity: parseInt(quantity)}).then(() => {
             this.vnApp.showSuccess(this.$translate.instant('Data saved!'));
             this.$scope.model.refresh();
+        }).catch(e => {
+            this.vnApp.showError(e.data.error.message);
+            this.$scope.model.refresh();
         });
     }