Fix the bug that create another game view when you clicked on the game tree for the game whose tab already existed.

Reported-by: hlong290494
Signed-off by: Long Nguyen Duc <lhnguyenduc@wpi.edu>
Fix the bug that open a new instance of game tab when it is already opened

Reported-by: hlong290494
Signed-off by: Long Nguyen Duc Hoang <lhnguyenduc@wpi.edu>
Merge pull request #301 from hlong290494/openExistingTab

Fix the bug that create another game view when you clicked on the game tree for the game whose tab already existed.