public function fileEditorLinkForm($request = null)
    {
        // Get ID either from posted back value, or url parameter
        if (!$request) {
            $this->jsonError(400);
            return null;
        }
        $id = $request->param('ID');
        if (!$id) {
            $this->jsonError(400);
            return null;
        }
        return $this->getFileInsertForm($id);
    }