[Feature Request] Follow system theme

[Silent-Hunter]

I would love a third option after Light and Dark, System Default, so that it will automatically be light or dark with the rest of the phone. Sometimes I'll use this late at night and it will be very bright until I can change the theme.

Thanks for this lovely app.

[PeterMinin]

I noticed there's a PR draft for this: #122. Not sure what's stalled it. Maybe backwards compatibility.