Add ability to uncheck box "Make this app available on Mac"

[mhleiftaylor]

By default, when uploading a new application, the checkbox "Make this app available on Mac" is checked.

Currently Fastlane does not seem to have the ability to uncheck this box. Our app is an enterprise clinical app which specifically cannot be available on Mac for security reasons. Right now we are having to manually deselect this for every build.

This checkbox is under Pricing and Availability