[Wax] Keep scroll bar in view
Issue description; as an author or editor I'm not able to add or reply to comments hidden behind the chat window unless the editor is viewed in fullscreen. Using the scroll bar at the bottom of the Manuacruypt text page allows a user to view comments. Manuscripts vary in length and a user may be required to scroll more the 20 times to view/use the scroll bar, then scroll up again to view the comments inline - this is poor UX.
The scroll bar should float at the bottom of the page.