Remove the space where the buttonbox would be when you deactivate it

[dcfreire]

Describe the solution you'd like
I use firefox withtout the buttonbox, but when I deactivate it using ArcWTF I get this big space after the last of the icons, and I'd like to remove it :).

Describe alternatives you've considered
I tried fiddling around with the css rules that seemed relevant, but none worked.

[beracira]

Try right clicking on the whitespace -> Customize Toolbar...
You should be able to remove the padding from there.

[KiKaraage]

Hi! Wanna check if you're still experiencing this issue in v133 after updating to the latest commits manually.