Fix the Preferences Tab can be opened more than one instance.
Reported-by: hlong290494
Signed-off by: Long Nguyen Duc Hoang <lhnguyenduc@wpi.edu>
Comment TeamEstimateTableModel.java
Reported-by: hlong290494
Signed-off by: Long Nguyen Duc Hoang <lhnguyenduc@wpi.edu>
Merge pull request #346 from hlong290494/fixPreferenceTabAndComment

Fix Preferences tab and comment TeamEstimateTableModel