Thank you! It was driving me mad.

I dunno who thought it would be a great idea to cover nearly 20% of the screen with this thing every time I change the volume (which thanks to a hearing issue I do regularly when watching a movie)...

Just updated Opera, which so far seems to have been a big mistake. (Version: 62.0.3331.43)

Now whenever I adjust my laptop volume / mute I get the attached for some reason. Is this something that's just appeared in Opera? I don't want it. How can I turn it off?