title: Groups or separator in UIAlertController as in new Music app
body: <p>I'm wondering if anyone knows a way to create an UIAlertController as an action sheet that looks like the one from the new Music app in iOS 8.4</p>
  
  <p>What I want is to split my buttons into groups as in the image below. As you can see there is a space between "Crear una lista Genius" and "Añadir a una lista...".</p>
  
  <p>Thank you.</p>
  
  <p><img src="https://i.stack.imgur.com/3SQBN.png" alt="Music app screenshot"></p>