allow simple choice for dark/light systray icon instead of blinding y…

[GloriousEggroll]

…ellow

[timlau]

Most of it is fine, except from having the selection for changing the dark/light icon on the menu.
This should be done in yumex preferences UI or even better detected by the system dark/light mode setting.

[GloriousEggroll]

I found having it in the menu was way easier because I don't have to wait for the application to load to change it. Also I don't know how to detect dark/light mode and that also doesn't work well for custom themes. It also doesn't work well for non-standard DEs beyond gnome/kde.

[timlau]

The best way to detect it is properly to use XDG Desktop Portal, most DE has implemented it

https://flatpak.github.io/xdg-desktop-portal/docs/doc-org.freedesktop.impl.portal.Settings.html

from dasbus.connection import SessionMessageBus
from dasbus.typing import get_native

bus = SessionMessageBus()

proxy = bus.get_proxy(
    "org.freedesktop.portal.Desktop", "/org/freedesktop/portal/desktop", "org.freedesktop.portal.Settings"
)

res = proxy.Read("org.freedesktop.appearance", "color-scheme")
print(get_native(res))