title: System UIBarButtonItem in SwiftUI
body: <p>I have a settings dialog and in the NavigationBar I'd like to have as leading item a 'Cancel' and as trailing item a 'Done' button (no EditButton, the values are editable right away).</p>
  <p>I could now add <code>Text(&quot;Done&quot;)</code> and provide my own translations for each supported language, but as there are already native system translations, why not using them?</p>
  <p>For Storyboards I would do something like</p>
  <pre><code>let doneButton = UIBarButtonItem(barButtonSystemItem: systemItem, target: self, action: #selector(self.doneButtonAction)
  </code></pre>
  <p>How can this be done in SwiftUI?</p>
  <p>(As UIBarButtonItem does not derive from UIView, I also cannot wrap it in a UIViewRepresentable.)</p>