Adding a rough-cut owner editor

--HG--
extra : convert_revision : svn%3A5ff7c347-ad56-4c35-b696-ccb81de16e03/trunk%4043456

src/Orchard.Web/Packages/Orchard.Users/Controllers/AdminController.cs

@@ -101,6 +101,9 @@ namespace Orchard.Users.Controllers {
         bool IUpdateModel.TryUpdateModel<TModel>(TModel model, string prefix, string[] includeProperties, string[] excludeProperties) {
             return TryUpdateModel(model, prefix, includeProperties, excludeProperties);
         }
+        void IUpdateModel.AddModelError(string key, LocalizedString errorMessage) {
+            ModelState.AddModelError(key, errorMessage.ToString());
+        }
     }
 
 }