_flatpak.py: Don't look for themes on disabled remotes.

Removes a warning.

_flatpak.py: Don't look for themes on disabled remotes.

Removes a warning.

don't filter out librewolf (#67)

* don't filter out any packages starting with "libre"

* special-case librewolf instead as suggested

2.3.1

_flatpak.py: Fix end-of-lifed-with-rebase handling.

This was only marking the eol'd package for removal, but would
fail to add a replacement, as the arguments for add_rebase() were
incorrect.