title: Hide title bar of default preference window (macOS)
body: <p>Is it possible to hide the title bar of the preference window? Using <code>.windowStyle(HiddenTitleBarWindowStyle())</code> on <code>Settings</code> does not seem to have an effect unlike using it on a regular <code>WindowGroup</code>:</p>
  <pre><code>// Works
  WindowGroup {
      ContentView()
  }
  .windowStyle(HiddenTitleBarWindowStyle())
  
  // Does not work
  Settings {
     PreferencesView()
  }
  .windowStyle(HiddenTitleBarWindowStyle())
  </code></pre>