title: why wkwebview hides under navigation bar
body: <p>I have a view controller which only has webview and I have constraints to top, leading,trailing as zero.</p>
  <p>When I am presenting the viewcontroller with full screen , Webview goes underneath the navigation bar.( above iOS 13 but it's showing fine when its iOS 12 )</p>
  <pre><code>let rootViewController = NavigationController(rootViewController: myViewController)
          rootViewController.modalPresentationStyle = .fullScreen
          initiatingViewController.present(rootViewController, animated: true)
  </code></pre>
  <p>I tried setting the top constraint as 44 but still not working.</p>
  <p>Any helpful pointers please</p>