[Feature Request] Add class for unavailable languages

[greg-man]

Hi folks,

as it's possible to choose whether the plugin should show only links with a translation, I would like to see an additional option to add a specific class to unavailable languages. This would give one the possibility to style the flags of unavailable languages in a custom way (e.g. grey out).

Maybe you could add this option in a future release?

Kind regards
Greg