This is common problem for this and other forums. I can mark thread in Bookmarks but when bookmarks are too many, it is not easy to browse and find something. It is good to be able to add tree hierarchy. Also "Labels" is better to become "Tags".
PS: Another missing thing is regional setting for date/time format. I prefer 24H than 12H.
PS: Another missing thing is regional setting for date/time format. I prefer 24H than 12H.