Intended to match the rest of the UI which is less rounded these days. See inline comment for reason for not matching `FormControl` corner radius just yet.
Addresses https://github.com/ppy/osu/discussions/33722.
ExpandableButton
RoundedButton
OverlayColourProvider
SettingsButton
OsuButton
This reverts commit 172524ff8a.
172524ff8a
As per @arflyte's spec, this should not have been there in the first place.