title: Data Table Output not scrollable in Y direction
body: <p>I have data I wish to show in a flexdashboard in R. I build the datatable with <code>DT::renderDataTable({DT::datatable(data(), options=list(scrollX=TRUE))})</code> </p>
  
  <p>This works just fine when showing something like 10 entries, but when I select the option to show 25 entries, I cannot scroll down to the bottom of the page and click on the second page button, next button, etc. I cannot scroll vertically like I could previously. I have tried the <code>sScrollY = "300px"</code> options, but this doesn't let the data table expand to fill the full page on my flexdashboard. The problem is rows of observations being cut off and inaccessible when I try to scroll in the y-direction. </p>
  
  <p>I am wondering what I need to do to make datatables expand and fill as expected, as shown in <a href="https://shiny.rstudio.com/gallery/datatables-options.html" rel="noreferrer">https://shiny.rstudio.com/gallery/datatables-options.html</a></p>
  
  <p>From the example, you can see how it is still possible to scroll up and down when you change the number of rows shown. I cannot do this in the new version of datatable. As of right now, I am limiting the number of rows displayed to 10...however, this is not a long term solution.</p>
  
  <p>Any ideas are greatly appreciated. Thank you. Best, NF</p>