currently when as a user you have a fork of a given central repository, there is no way to know if the user already has a fork and to navigate from the central repository to the user's fork.
In this case, I usually end up trying to fork the central repository, only to get an error message that a repository with the same name (my existing fork) already exists in my personal project. And still I have no easy way to navigate to this repository. I have to come back to the repository, go to my profile, than find the repository based on the name. This is not straightforward.
I would like the fork button to be smarter, and offer me to browse my existing fork if I have one in my personal project. I like the way github does it : it displays the list of organizations (i.e. projects) where I can create repositories, and if the corresponding org. already contains a fork of the repository, then it offers to browse it instead of creating a new one.
It would be great if it could be implemented that way in Stash.