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Gmail - show FORMATTED full date and time in mail list

Just show the full date and time on the list instead of only short date. Useful if you need to create a report and you base on your activity and it's timing. Or when you look at mails and want to find one visually by looking on times.

// ==UserScript==
// @name        Gmail - show FORMATTED full date and time in mail list
// @description Just show the full date and time on the list instead of only short date. Useful if you need to create a report and you base on your activity and it's timing. Or when you look at mails and want to find one visually by looking on times.
// @include     https://mail.google.com/mail/*
// @version 0.0.1.20180924133221
// @namespace https://greasyfork.org/users/153157
// ==/UserScript==

var formatDate = function(dateString) {
  var dateTime = new Date(dateString);
  var date = dateTime.toISOString().split('T')[0];
  var time = dateTime.toTimeString().substr(0, 5);
  return `${date} ${time}`;  
};

(function() {
  window.setInterval(function() {
    var date_titles_main = Array.from(document.getElementsByClassName("xW xY"));
    var date_titles_thread = Array.from(document.getElementsByClassName("g3"));
    date_titles_main.forEach(function(element, index, array) {
      var elements = element.childNodes;
      var title = elements.length > 0 ? elements[0].title : false;
      if (title) {
        title = formatDate(title);
      }
      if (title && elements[0].innerHTML != title) { elements[0].innerHTML = title; }
    });
    date_titles_thread.forEach(function(element, index, array) {
      if (element.title && element.innerHTML != element.title) { element.innerHTML = formatDate(element.title); }
    });
    Array.from(document.getElementsByClassName("xX")).forEach(function(element, index, array) {
      element.style.width = '20ex';
    });
  }, 2000);
})();