Now checking if current game allows trading in viewDidAppear and adding/removing trade button accordingly.  Was previously checking only in viewDidLoad and missing some cases where the button should be updated.
Now checking if current game allows trading in viewDidAppear and adding/removing trade button accordingly.  Was previously checking only in viewDidLoad and missing some cases where the button should be updated.

fielddaylab/sifter-ios,fielddaylab/sifter-ios