title: Change title of browser window in Vaadin 8
body: <p>How does one change the title seen in the client web browser window or tab title bar in a <a href="https://vaadin.com/home" rel="nofollow noreferrer">Vaadin</a> 8 app?</p>
  
  <ul>
  <li>When I set the content of the initial <a href="https://vaadin.com/api/com/vaadin/ui/UI.html" rel="nofollow noreferrer"><code>UI</code></a> with my <code>Layout</code> object, how can I specify a title for that UI’s window?</li>
  <li>If I open another browser window/tab with another <code>UI</code>, how do I set the title in the native title bar of that window/tab?</li>
  </ul>