title: How to detect when RPSystemBroadcastPickerView is dismissed?
body: <p>In the app, I am using a <code>RPSystemBroadcastPickerView</code> to start a system-wide screen recording. I need to react to the user starting screen record or dismissing the shown picker view. In both cases, the system view gets dismissed.</p>
  
  <p>I assumed that dismissing the system picker view will trigger a <code>viewDidAppear</code> event on the currently shown view controller. This does not happen. I tried to test if the <code>AppDelegate</code> triggers <code>applicationDidBecomeActive</code> or <code>applicationWillEnterForeground</code> - again without success (this are triggered when user open control center).</p>
  
  <p>Does anyone have a suggestion what else to try?</p>