BTHLABS-66: Prepping for public release: Take three

I smell a drastic change to auth flow in the Mac app... Let's see if it
gets approved this time :D.

services/apple/iOS (App)/AuthorizationProgressViewController.h

@@ -9,9 +9,12 @@
 
 NS_ASSUME_NONNULL_BEGIN
 
+@class MultilineLabel;
+
 @interface AuthorizationProgressViewController : UIViewController
 
 @property IBOutlet UIActivityIndicatorView *progressIndicator;
+@property IBOutlet MultilineLabel *progressLabel;
 
 @end