Ability to focus / grab the scrollbar handle in the backlog

At the moment it is not possible to focus/ grab the backlog scrollbar to move it around. For a very long backlog, it takes a while to scroll to the bottom.

How to reproduce:

• Using a mac and chrome
• Navigate to the backlog
• Try to scroll down using the scrollbar handle

Actual result:

• Unable to successfully grab focus on the scrollbar handle, preventing fast scrolling

Expected result

• To be able to grab the scrollbar handle and fast scroll to the bottom or where ever