Add an Auto(Black) Theme Option

[BerndSchmecka]

Your use case

What would you like to do?

I would like to have an option "Auto (Black)" in the theme settings.

Why would you like to do it?

Currently, I have the option to set the theme to Auto, which causes Element to use the light theme during daytime (I have my iOS Theme set to Auto too) and the dark theme during night. I also have the option to set my theme to black (AMOLED Mode). Since I like the black theme more, but I also want to have the light theme during daytime, I'd suggest adding a "Auto (Black) option.

How would you like to achieve it?

I don't know

Have you considered any alternatives?

there aren't any alternatives to this specific use case (at least I'm not aware of anything like that)

Additional context

none

[tamcore]

Already requested the same back in April :( #5966

[pixlwave]

Duplicate of #5966