UIFe for Ubuntu Dock extension

[Didier Roche]

Hey documentation team,

I want to warn you up about slight changes of the opacity behavior of 
the Dock as well as some keybindings rationalization that we aim at 
upload next Monday ideally. I tried to give more details on 
https://bugs.launchpad.net/ubuntu/+source/gnome-shell-extension-ubuntu-dock/+bug/1717509.

If you have any question, do not hesitate to reach me out!

Cheers,
Didier