title: UIApplication keyWindow behavior changed
body: <p>After upgrading from Xcode 10.3.1 to Xcode 11.1 my custom Activity indicator added over all UIView is gone.
  It is added to keyWindow like this:</p>
  
  <pre><code>UIApplication.shared.keyWindow!.addSubview(PKHUD.sharedHUD)
  </code></pre>
  
  <p>And now it's gone below over other UIView:
  <a href="https://i.stack.imgur.com/aE5HV.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/aE5HV.png" alt="enter image description here"></a></p>