Adds a button with a given title to the receiver.
Original signature is '- (NSButton *)addButtonWithTitle:(NSString *)buttonTitle'
Available in Mac OS X v10.3 and later.


- buttonTitle (NSString)
- Title of the button to add to the alert. Must not be nil.

Button added to the alert.

- Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later), 10.5 (For Mac OS X 10.5 and later)