Ensures events for deleting, trashing and unpublishing are done using the event messages, updates UI to support showing these messages in the list view, Since we cannot change the

method results on a service, we've created a new temporary service that we will explicitly implement with an extension method to get it. This is temporary until v8 where we will just replace
the original methods on the service with these methods and then remove this class.

src/Umbraco.Web/Models/ContentEditing/Notification.cs

@@ -6,6 +6,18 @@ namespace Umbraco.Web.Models.ContentEditing
     [DataContract(Name = "notification", Namespace = "")]
     public class Notification
     {
+        public Notification()
+        {
+            
+        }
+        
+        public Notification(string header, string message, SpeechBubbleIcon notificationType)
+        {
+            Header = header;
+            Message = message;
+            NotificationType = notificationType;
+        }
+
         [DataMember(Name = "header")]
         public string Header { get; set; }
         [DataMember(Name = "message")]

src/Umbraco.Web/Models/ContentEditing/SimpleNotificationModel.cs

@@ -0,0 +1,25 @@
+using System.Collections.Generic;
+using System.Runtime.Serialization;
+
+namespace Umbraco.Web.Models.ContentEditing
+{
+    [DataContract(Name = "notificationModel", Namespace = "")]
+    public class SimpleNotificationModel : INotificationModel
+    {
+        public SimpleNotificationModel()
+        {
+            Notifications = new List<Notification>();
+        }
+
+        public SimpleNotificationModel(params Notification[] notifications)
+        {
+            Notifications = new List<Notification>(notifications);
+        }
+
+        /// <summary>
+        /// This is used to add custom localized messages/strings to the response for the app to use for localized UI purposes.
+        /// </summary>
+        [DataMember(Name = "notifications")]
+        public List<Notification> Notifications { get; private set; }
+    }
+}