title: Dropdown with multi-option select
body: <p>I want some modification in following jsfiddle  </p>
  
  <p><strong><a href="https://jsfiddle.net/zqvvuts6/5/" rel="nofollow noreferrer">https://jsfiddle.net/zqvvuts6/5/</a></strong></p>
  
  <p>If in child options user click on other then it shows textbox for search.</p>
  
  <p>In dropdown options as following </p>
  
  <pre><code>Swedish Cars (parent)
  Volvo (child)
  Saab (child)
  other ( onclick it should show textbox)
  </code></pre>