Better language filter

Hello,

I would like to have a better language filter. I have multilingualism enabled. When I click on the unread posts I see the list of threads with their respective flag for the language.

If I click on one of the flags of a thread in certain language, e.g. for reading threads in English, I'm redirected to the forum where that particular thread is located instead of just filtering the English threads in the same list of unread posts independently of its forum.

P.S.: The same applies for unresolved and watched threads.