Ability to focus / grab the scrollbar handle in the backlog

Issue Summary

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.

Steps to Reproduce

1. Using a mac and chrome
2. Navigate to the backlog
3. Try to scroll down using the scrollbar handle

Expected Results

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

Actual Results

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

Workaround

Scroll up and down using the mouse or trackpad/ touchpad