title: Uikit Notification finish then navigate to another page
body: <p>I want to popup a notification then navigate to the login page.</p>
  
  <pre><code>UIkit.notification({message: 'no access, please login again', status: 'danger'});
  this.router.navigateByUrl('login'); // angular navigation by url
  </code></pre>
  
  <p>However it popups the message and navigate to the login page at the same time. What I want is to wait the notification closed then doing the navigation.</p>
  
  <p>If we only have the first line code for the notification, the popup window will vanish in 5 seconds by default. In my code there are two lines, the popup window vanishes quickly then running the second line code.</p>