Map webhook id property

Author: bjarnef

src/Umbraco.Web.BackOffice/Mapping/WebhookMapDefinition.cs

@@ -1,4 +1,4 @@
-using Umbraco.Cms.Core.Mapping;
+using Umbraco.Cms.Core.Mapping;
 using Umbraco.Cms.Core.Models;
 using Umbraco.Cms.Core.Webhooks;
 using Umbraco.Cms.Web.Common.Models;
@@ -21,6 +21,7 @@ private void Map(WebhookViewModel source, IWebhook target, MapperContext context
         target.Events = source.Events.Select(x => x.Alias).ToArray();
         target.Url = source.Url;
         target.Enabled = source.Enabled;
+        target.Id = source.Id;
         target.Key = source.Key ?? Guid.NewGuid();
         target.Headers = source.Headers;
     }