title: Datatables column filtering with icons
body: <p>I try to filter a specific column with a dropdown in datatables with icons in it. Everything works fine with a text box but not with a select-box.
  <a href="https://i.stack.imgur.com/LuMYa.png" rel="nofollow noreferrer">enter image description here</a></p>
  <p>I also set up a jsfiddle, but couldnt get it to run:</p>
  <pre><code>Demo: https://jsfiddle.net/eyk107/uvznse86/
  </code></pre>
  <p>I only want to filter the icons by the icons-title or alt.
  Thank you in advance.</p>
  <p>BR
  Eyk</p>