--- webform.module
+++ (clipboard)
@@ -4826,4 +4826,14 @@
 
   // Ensure only wanted components are returned, even all are loaded.
   return $return_all ? $component_list : array_intersect_assoc($component_list, $enabled_list);
+}
+
+function webform_content_extra_fields_alter(&$extra, $type_name) {
+  if ($type_name == 'webform') {
+    $extra['webform'] = array(
+      'label' => t('Webform'),
+      'description' => t('webform display'),
+      'weight' => 1,
+    );
+  }
 }
\ No newline at end of file