Remove `Mullvad Browser theme`
In Settings > Language and Appearances
, there are [Mullvad Browser Theme, System theme, Light, Dark].
According to @pierov , Mullvad Browser theme and System Theme are probably the same.
There's no need to have the System Theme called "MB theme", so we should remove it.
The whole section should be hidden as it's actually a setting intended to give the theme preference for websites and not only the browser internal pages.
Edited by ruihildt