Fixes a BisaChat fullscreen bug in Chrome

BCChromeFullscreenFix.user.js

// ==UserScript==
// @name         BisaChat Chrome Fullscreen Fix
// @namespace    http://projects.0xleon.com/userscripts/bc-chrome-full-fix
// @version      1.0.0
// @description  Fixes a BisaChat fullscreen bug in Chrome.
// @author       Stefan Hahn
// @copyright    2018, Stefan Hahn
// @match        https://bisachat.bisafans.de/index.php?room/*/
// @grant        unswafeWindow
// @run-at       document-body
// ==/UserScript==

(function() {
    'use strict';

    let style = unsafeWindow.document.createElement('style');
    let text = unsafeWindow.document.createTextNode('.main > div { height: initial !important; }');
    style.appendChild(text);
    unsafeWindow.document.querySelector('head').appendChild(style);
})();