Add scrollbar to workspace directory page

[#1]

A little while back, the vertical scrollbar on this page disappeared. While you can use a scroll wheel on a mouse I've been told, some of use laptops which do not have that feature. There is no easy way to go through the list of reports as there is no scroll bar and the page up/down don't work either. The only option is to use arrow keys which are slow or go to the workspace manager every time.