I don't think you can edit that info, I think it's a "report" of sorts (don't know what the technical term is), in real-time.
My Discussions are the ten most recent threads you've posted to (I think - it may also be the most recent threads you've visited. I tried to do a test to see if that was the case, and I can't tell...) Active are the ten most recent threads that have been posted to by anyone on the Forum, Unanswered are the ten most recent that have not actually had a reply.
If anything I've written here is wrong, someone please let me know...
I really like these shortcuts, and it makes it much easier to "check in" when I have a few minutes and see any replies on threads I've just posted to.
"No person was ever honored for what he received. Honor has been the reward for what he gave." - Calvin Coolidge