[FileCards] method signature changed, fixed parameter
[FileCards] null is valid (checked via assembly browser)
[FileCards] fixed signature
Xamarin.Mac 1.11.1.201
[FileCards] verified UTType issue. https://trello.com/c/iy0Pm1WI
Xamarin.Mac 1.11.1.201
[FileCards] verified issue with Delegate bindings. TODO: https://trello.com/c/kUzddDwf
Xamarin.Mac 1.11.1.201
Merge branch 'await-filecards' into magic-types-migration