Changed ocio config for gui app to use OCIO.DisplayTransform.
Changed ocio config for gui app to use OCIO.DisplayTransform.

This affects the default in Preferences, the Viewer overlay, and the color picker.

chippey/gaffer,appleseedhq/gaffer,ivanimanishi/gaffer,lucienfostier/gaffer,ImageEngine/gaffer,andrewkaufman/gaffer,andrewkaufman/gaffer,johnhaddon/gaffer,ivanimanishi/gaffer,GafferHQ/gaffer,appleseedhq/gaffer,lucienfostier/gaffer,andrewkaufman/gaffer,chippey/gaffer,appleseedhq/gaffer,hradec/gaffer,boberfly/gaffer,appleseedhq/gaffer,chippey/gaffer,boberfly/gaffer,GafferHQ/gaffer,ImageEngine/gaffer,hradec/gaffer,johnhaddon/gaffer,johnhaddon/gaffer,johnhaddon/gaffer,lucienfostier/gaffer,andrewkaufman/gaffer,ImageEngine/gaffer,hradec/gaffer,GafferHQ/gaffer,chippey/gaffer,ivanimanishi/gaffer,ImageEngine/gaffer,ivanimanishi/gaffer,boberfly/gaffer,lucienfostier/gaffer,boberfly/gaffer,hradec/gaffer,GafferHQ/gaffer,johnhaddon/gaffer,hradec/gaffer,andrewkaufman/gaffer,GafferHQ/gaffer