title: No icon in button elfinder
body: <p>I have following the instalation on <a href="https://github.com/Studio-42/elFinder" rel="nofollow noreferrer">elfinder</a></p>
  
  <p>My code looked like this :</p>
  
  <pre><code>&lt;head&gt;
    &lt;link rel="stylesheet" href="http://192.168.5.223/develop_tsurumaru/assets/admin/css/jquery-ui.min.css"&gt;
    &lt;link rel="stylesheet" href="http://192.168.5.223/develop_tsurumaru/assets/admin/css/bootstrap.min.css"&gt;
    &lt;link rel="stylesheet" href="http://192.168.5.223/develop_tsurumaru/assets/admin/css/theme.css"&gt;
    &lt;link rel="stylesheet" href="http://192.168.5.223/develop_tsurumaru/assets/admin/css/elfinder.min.css"&gt;
  &lt;/head&gt;
  
  &lt;body&gt;
  
     &lt;div id="elfinder-tag"&gt; &lt;/div&gt;
  
  
     &lt;script src="http://192.168.5.223/develop_tsurumaru/assets/admin/js/jquery.js"&gt;
     &lt;script src="http://192.168.5.223/develop_tsurumaru/assets/admin/js/jquery-ui.min.js"&gt;
     &lt;script src="http://192.168.5.223/develop_tsurumaru/assets/admin/js/bootstrap.min.js"&gt;
     &lt;script src="http://192.168.5.223/develop_tsurumaru/assets/admin/js/elfinder.min.js"&gt;
  
     &lt;script&gt;
      jQuery('#elfinder-tag').elfinder({
              url: 'http://192.168.5.223/develop_tsurumaru/members/megumi/file_delivery_order/elfinder'
          }).elfinder('instance');
  
  &lt;/script&gt;
  
  &lt;/body&gt;
  </code></pre>
  
  <p>But gives me a button with no icon like this :</p>
  
  <p><a href="https://i.stack.imgur.com/9fbif.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/9fbif.png" alt="No icons on button"></a></p>
  
  <p>For any help, it so appreciated</p>