Merge pull request #2522 from tomfulton/u4-7757-client2

U4-7757 - Show notifications when Unpublishing event is canceled

src/Umbraco.Web.UI.Client/src/common/directives/components/content/edit.controller.js

@@ -216,6 +216,7 @@
             $scope.page.buttonGroupState = "success";
 
           }, function(err) {
+            formHelper.showNotifications(err.data);
             $scope.page.buttonGroupState = 'error';
           });
       }