Equibooru "order:comments" search support

        else if(preg_match("/^order[=|:](comments)[_]?(desc|asc)?$/i", $event->term, $matches)){
            $ord = strtolower($matches[1]);
            $default_order_for_column = "ASC";
            $sort = isset($matches[2]) ? strtoupper($matches[2]) : $default_order_for_column;

            $cmt_query = "SELECT image_id, COUNT(*) AS cnt FROM comments GROUP BY image_id ORDER BY cnt $sort, image_id DESC";
            $cached_order = implode(",", $database->get_col($database->scoreql_to_sql($cmt_query)));;

            Image::$order_sql = "FIELD(images.id, $cached_order) DESC";
            $event->add_querylet(new Querylet("images.id IN ($cached_order)"));
            $event->add_querylet(new Querylet("1=1")); //small hack to avoid metatag being treated as normal tag
        }