Add static scrollbar to top of pages (supports display and nav for large tables)

We have a number of large tables in our XWiki instance (many of which were migrated over from Confluence) and are finding that reading across the tables is difficult as the scrollbar can only be accessed from the bottom of the page. So our users need to go to the bottom of the page, slide over, then scroll back up to the part of the table they want to view. We've added the Make Tables Sortable macro to make the table headers sticky and provide filtering, but navigating sideways still requires a few extra steps. 

Could the scroll bar be fixed at the top / remain static as you go down the page (similar to how the editor and save toolbars function)? 

Thanks!