docs/guidelines/platform/xamarin-mac.md is wrong about reactive views

[jwosty]

The documentation seems to imply that you can use many of the same reactive types that are available on Xamarin.iOS, which is not true. For example, on Mac, there is no:

• ReactiveTableViewController
• ReactiveTableView
• ReactiveCollectionView
• ReactiveCollectionViewController
• ReactiveNavigationController
• ReactiveTabBarController
• ReactivePageViewController

Root of the issue is that these types are all derived from UIKit stuff (i.e. iOS's UITableView instead of macOS's NSTableView). EITHER they should be removed from the xam.mac documentation, OR they should be ported (which I imagine can't be too bad, since UIKit and AppKit are so similar, right?).

[worldbeater]

they should be ported

This is a brilliant idea! We'd really love to receive a contribution from someone who can implement and test those IViewFor controls on a Mac machine. Please feel free to open a PR if you have time and head over to our Slack channel!

[jwosty]

@worldbeater I am definitely considering doing this, assuming I can find the time.