U4-5301 - fix AppendDocumentXml + nodes sorting

src/Umbraco.Web/Cache/UnpublishedPageCacheRefresher.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Web.Script.Serialization;
+using umbraco;
 using Umbraco.Core.Cache;
 using Umbraco.Core.Models;
 using System.Linq;
@@ -81,6 +82,7 @@ namespace Umbraco.Web.Cache
         public override void Refresh(int id)
         {
             RuntimeCacheProvider.Current.Delete(typeof(IContent), id);
+            content.Instance.UpdateSortOrder(id);
             base.Refresh(id);
         }
 
@@ -94,6 +96,7 @@ namespace Umbraco.Web.Cache
         public override void Refresh(IContent instance)
         {
             RuntimeCacheProvider.Current.Delete(typeof(IContent), instance.Id);
+            content.Instance.UpdateSortOrder(instance);
             base.Refresh(instance);
         }
 
@@ -112,6 +115,7 @@ namespace Umbraco.Web.Cache
             foreach (var payload in DeserializeFromJsonPayload(jsonPayload))
             {
                 RuntimeCacheProvider.Current.Delete(typeof(IContent), payload.Id);
+                content.Instance.UpdateSortOrder(payload.Id);
             }
 
             OnCacheUpdated(Instance, new CacheRefresherEventArgs(jsonPayload, MessageType.RefreshByJson));