title: elfinder module throws jquery error in drupal 7
body: <p>I have installed elfinder module in drupal 7 but it throws jQuery error when we loading elfinder page but file handling functionalities fine. Also icons in elfinder not aligned properly. </p>
  
  <p><a href="https://i.stack.imgur.com/pJ7CT.png" rel="nofollow noreferrer">Click here for elfinder icons issue</a>. </p>
  
  <blockquote>
    <p>TypeError: $(...).once is not a function<br>
    $('.colorbox', context)</p>
  </blockquote>
  
  <p>Thanks in advance.</p>