title: Ribbon button as menu
body: <p>How should Ribbon XML look like to create a button like button "New" (with a small arrow below text) when you click it to create a list with 2 new small buttons like a list?</p>
  
  <p>Button image:</p>
  
  <p><img src="https://i.stack.imgur.com/V4yzR.png" alt="Image"></p>