Would it be possible to add bullets (or some other symbol) for a thread with a post you've favorited, a thread you've listed, and/or a thread with a post you've listed? I know the empty-post-you-immediately-delete trick, but that doesn't last forever and it seems like a clumsy kludge.
It's something I've pondered in the past. These kinds of things can have negative impacts on website performance so we have to be careful about adding them. But I'll think about it some more.
I'd love to add my support of some feature like this, I have plenty of lists and so on but jumping from screen to screen can be a bit of a navigation nightmare.