U4-8416 Empty recycle bin does not refresh or gives feedback to user

src/Umbraco.Web/WebApi/HttpRequestMessageExtensions.cs

@@ -9,6 +9,7 @@ using System.Threading.Tasks;
 using System.Web;
 using System.Web.Http;
 using System.Web.Http.ModelBinding;
+using System.Web.Http.Results;
 using Microsoft.Owin;
 using Umbraco.Core;
 using Umbraco.Web.Models.ContentEditing;
@@ -124,6 +125,22 @@ namespace Umbraco.Web.WebApi
             return request.CreateValidationErrorResponse(notificationModel);
         }
 
+        /// <summary>
+        /// Creates a succressful response with notifications in the result to be displayed in the UI
+        /// </summary>
+        /// <param name="request"></param>
+        /// <param name="successMessage"></param>
+        /// <returns></returns>
+        public static HttpResponseMessage CreateNotificationSuccessResponse(this HttpRequestMessage request, string successMessage)
+        {
+            var notificationModel = new SimpleNotificationModel
+            {
+                Message = successMessage
+            };
+            notificationModel.AddSuccessNotification(successMessage, string.Empty);
+            return request.CreateResponse(HttpStatusCode.OK, notificationModel);
+        }
+
         /// <summary>
         /// Create a 400 response message indicating that a validation error occurred
         /// </summary>