[Feature Request] Change the background of the tapback menu from white to dark gray when in dark mode (like on iOS)

[sabogalc]

This should be as easy as changing lines 16 and 42 of AcknowledgmentPicker.scss from white to #202124. However, I don't know how to make it so that while in light mode, it is white, and while in dark mode, it is light gray. Below is a screenshot from iOS that I used as a reference, as well as a video demonstration on the frontend (although there is a bit of a white border on the menu).

React.Redux.App.-.Brave.2021-06-28.14-00-12.mp4

[sabogalc]

I tried fixing this but unfortunately my changes didn't work

[sabogalc]

#52