WowAce

What is the enhancement in mind? How should it look and feel?
I'd love it if when I went into an instance, only the quests/achievements/what-have-you in that instance show. It's not like I'm going to be doing any world questing while I'm in a dungeon. Then, of course, when you leave the instance, your quests would go back to how they were before.

Please provide any additional information below.
I'd like this functionality to be automatic and to have the option to turn it off in the options (just in case someone else doesn't like it for some reason).