We were only handling the old single-value 'version' key, even though
we handled the 'versions' key when finding remote related refs.
The result of this was that some extensions, such as the 19.08 opengl
default one was installed by default (as it was found as remote related)
yet still removed with --unused (as it was not locally related).
Fixes https://github.com/flatpak/flatpak/issues/3004Closes: #3093
Approved by: mwleed
(manually cherry-picked from commit e4b1d16b7d)