title: How to tell when a UIMenu gets DISMISSED
body: <p>I have a UIButton with a UIMenu attached, I need to know when the UIMenu is dismissed (by tapping outside the UIMenu) so I can remove the button that the UIMenu is attached to.</p>
  <p>I have seen there are notifications for UIMenuController, but that is different.</p>
  <p>edit: Here's some additional info because this question was related to a different question.</p>
  <p>I don't care when the UIMenu is called, I only care when it is dismissed</p>