It's a good idea, although I'm uncertain if its meant to show anything at current? when I click nothing happens, I can't even remove the last chance banner and I recall usually being able to remove banners Link
You must accept CH cookies first by clicking the accept button at the popup at the bottom. Then you will see a number badge on the "Whats new" button showing how many unread news you have and clicking on it will open a side panel.
Unfortunately this cookie banner is currently blocked by most adblockers.