title: strange behavior when calling [NSOpenPanel openPanel]
body: <p>Does anyone have an idea why calling [NSOpenPanel openPanel] can cause this:</p>
  
  <p>2016-12-02 13:04:13.993030 MyApp[18817:1386980] !!! NSAccessibilityUnignoredDescendant - attempt to return ignored element: 
  2016-12-02 13:04:13.993087 MyApp[18817:1386980] !!! Unable to override AXTitleUIElement on .  NSAccessibilityUnignoredDescendant returned nil.</p>
  
  <p>Never seen anything like it?</p>