Choice of time-switch

[Hochiss]

Thanks for this very promising extension, yet time-switching not prefect. To determine when to switch to dark/light-mode depends on sunrise-sunset time, yet not everyone would like to leak their geo- location. So how about these 2 solutions:

1. Add choice of time zone(or city name), so it can automatically get related sunset/rise time for switch;
2. Dark mode first came from macOS now developed extensively and more people in favor of it. How about e.g. use macOS as reference to switch? i.e. once macOS changes its theme, this extension will follow as well. (PS: currently the 3rd setting: "Change themes based on the system theme" doesn't work)

/BR