Allow forcing dark color scheme regardless of system setting
Request: Allow forcing Web to use dark theme regardless of global system setting.
https://gnome.pages.gitlab.gnome.org/libadwaita/doc/main/enum.ColorScheme.html#force_dark
Numerous GNOME apps implement this, and especially for something the user spends a lot of time in, an option to enable dark theme just for that window would be quite useful.
Workaround of launching with Exec=env GTK_THEME=Adwaita:dark epiphany %U isn't really a workaround, since this loads an older style of dark theme and introduces various issues, such as the padding being terrible in the preferences window.