Watchlist for read threads

[rapsaodan84]

I'd like to either be able to see read threads in the watchlist, or (even better) have another "Starred" list.
The watchlist could show only unread threads, while the starred list would show all threads, even the read ones.

There are some threads that don't change often but I like to read at anytime, for example the list of trusted escrows.

I think the option to "star" a thread or add to favorites would be useful.

(Or let me know if this is already possible and I just didn't find how).