title: Undo/redo button in App Inventor 2?
body: <p>Is there any undo/redo button in <a href="http://ai2.appinventor.mit.edu/" rel="nofollow noreferrer">App Inventor 2</a>? Surprisingly I haven't found any. Did I miss something?</p>
  
  <p>App Inventor 1 used to have such buttons for the block editor:</p>
  
  <p><img src="https://i.stack.imgur.com/KhCF6.jpg" alt="enter image description here"></p>