Disable the ">>" (Add all) button when there is no requirements.
Delete NewGameView.java because it is not used anymore.

Reported-by: hlong290494
Signed-off by: Long Nguyen Duc Hoang <lhnguyenduc@wpi.edu>
Restore accidentally deleted NewGameView.java
Merge pull request #254 from hlong290494/addAllDisabled

Disable the ">>" (Add all) button when there is no requirements.