maksimkurb / Mare hidden files grey in ruTorrent

// ==UserScript==
// @name            Mare hidden files grey in ruTorrent
// @description     In ruTorrent, when adding a torrent and selecting download directory, script will make all hidden directory (starting with .dot) grey
// @match           */plugins/_getdir/getdirs.php*
// @licence         MIT
// @copyright       2018, maksimkurb (https://openuserjs.org/users/maksimkurb)
// @author          Maxim Kurbatov
// @updateURL       https://openuserjs.org/meta/maksimkurb/Mare_hidden_files_grey_in_ruTorrent.meta.js
// ==/UserScript==

(function() {
    'use strict';
    var regexp = /( |&(\w+);)*(\.)(\w+)/;
    document.querySelectorAll('.rmenuobj td.rmenuitem').forEach(item => {
        if (regexp.test(item.innerText)) {
            item.style.color="grey";
        }
    });
})();