PEP8 and typo fixes in MacOS X file chooser.
PEP8 and typo fixes in MacOS X file chooser.

cleett/plyer,kivy/plyer,kived/plyer,kived/plyer,KeyWeeUsr/plyer,johnbolia/plyer,KeyWeeUsr/plyer,johnbolia/plyer,kivy/plyer,kostyll/plyer,kivy/plyer,kostyll/plyer,KeyWeeUsr/plyer,cleett/plyer