title: React: Blur background when Material-UI Dialog appeared
body: <p>Is there any way I can blur the background content when an MUI dialog appears? (the default action is darkening the background, but I need to blur it).
  Here's what I am looking for:</p>
  <p><a href="https://i.stack.imgur.com/lnTVQ.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/lnTVQ.jpg" alt="" /></a></p>