public function getFilterFieldsOrder()
{
$filter_field_order = array(array('key' => array('width' => 2)), array('prefix' => array('width' => 2)));
$post_filter_field = array(array('showprefix' => array('width' => 2)));
return array_merge($filter_field_order, parent::getFilterFieldsOrder(), $post_filter_field);
}
