Add indicator to show that the inactive tabs in Game Log/Chat have new updates

[AquaDragon]

With the addition of a chat box that occupies the same footprint as the game log (#97), it may be useful to have an indicator that appears when the other tab has new updates. For example, when the Game Log is selected, an indicator would appear when there are new Chat messages. Similarly, if the Chat is selected, an indicator would appear when the game progresses and there are new log messages related to the game.