"weather-none-available" has been the traditional name in Oxygen and
is referenced as such in existing KDE and non-KDE code, also used as
name in other icon themes (e.g. Numix).
One could argue that the icon fallback mechanism should still result
in "weather-none" being used with Breeze. Issues with that though are:
- is inconsistent naming with other icon themes (incl. Oxygen)
- fails with distributions patching the Breeze theme to inherit Oxygen, as then the Oxygen icon will be used.
BUG: 379875