Enable Dark theme for script fields in Utah

Enable a dark theme on the new SN Monaco Editor.

// ==UserScript==
// @name         Enable Dark theme for script fields in Utah
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Enable a dark theme on the new SN Monaco Editor.
// @author       dgcst
// @match        https://<instance_name_here>.service-now.com/*
// @grant        none
// @license      MIT
// ==/UserScript==

(function() {
    'use strict';

    try {
        if (monaco) {
            monaco.editor.setTheme('vs-dark');
        }
    } catch (error) {
        // Do nothing
    }
})();