Keeping Track of Games in Games Database

It would be very helpful if, in the Games Database, there was a way to keep track of the master games we've viewed. For instance, if I want to systematically play over all of Paul Morphy's games, I either have to play them all in one session (HA), keep track on a piece of paper, or just hope I remember where I left off. On chessgames.com, games that you've played over are highlighted in blue (or purple?) and stay that way for some time. Therefore, if I'm playing through a collection, it's easy for me to pick up where I left off. 
Chess.com could probably do something similar. Highlight games we've played over, and then, after a month or so, automatically revert them to the original color.