add Notification

src/Shared/HandyControlDemo_Shared/Data/MessageToken.cs

@@ -112,6 +112,8 @@
 	
         public static readonly string SpriteDemoCtl = nameof(SpriteDemoCtl);
 	
+        public static readonly string NotificationDemoCtl = nameof(NotificationDemoCtl);
+	
         public static readonly string ButtonDemoCtl = nameof(ButtonDemoCtl);
 
         public static readonly string RepeatButtonDemoCtl = nameof(RepeatButtonDemoCtl);