Even if I implement your request it will not solve the problem. Circling through the games via "Next game" button allows you to go only through games where your turn is. If there is a finished game and and it is opponent's turn, you will not be able to get to such game.
Besides, I think this functionality is redundant. You can clearly see finished games in the active games list. Next game button was intended to quickly browse through your games where you can make a move.