[bug] Flatpak does not automatically switch from/to dark theme when System theme is selected

[luciofstars]

leading to things like this:

(Using Fedora Silverblue, if that matters)

[github-actions]

This issue is stale because it has been open 150 days with no activity. Remove stale label or comment or this will be closed in 14 days.

[su-ex]

See the FAQ. With a switch to the newer codebase currently in development, this will be resolved.
It won't be fixed for the old codebase anymore, only thus adding the label.