title: How do I get the table header to align to top and stay at top?
body: <p>I've got a virtualized table that I'm working on (using an example). How do I get the table header to line up correctly and also remain at the top of the table while scrolling </p>
  
  <p>Code sandbox:-</p>
  
  <p><a href="https://codesandbox.io/s/material-ui-table-virtualized-t2xkt" rel="nofollow noreferrer">https://codesandbox.io/s/material-ui-table-virtualized-t2xkt</a></p>