title: Material-UI: Bottom Navigation Not Showing at the bottom of the page
body: <p>I am trying to use the <a href="http://www.material-ui.com/#/components/bottom-navigation" rel="nofollow noreferrer">Bottom Navigation</a>, but it appears not showing at the bottom of the page. Instead it is showing relative with its above DOM.</p>
  
  <p>Do we have to build separate layout and inject the Bottom Navigation Component to the fixed bottom position?</p>
  
  <p>Thanks,</p>