title: Scrollable list with fixed button
body: <p>I have some button with dropdown list.</p>
  
  <p><code>Example:</code>   <a href="https://jsfiddle.net/DTcHh/16589/" rel="nofollow">jsfiddle</a></p>
  
  <p>As you can see list is scrollable, but I want to add button to the bottom and it should be fixed. How could I accomplish that?  </p>