title: NSButton Alternate Title binding
body: <p>How do I bind NSButton's alternate title? </p>
  
  <p>In my model object I have a boolean value, that represents what the button's title should be. For example if the user isAdmin, the button's value is Edit. If the user !isAdmin the button's title is View.</p>
  
  <p>Currently I am using an NSValueTransformer, to transform the boolean value into a string. But this quickly becomes cumbersome, when I have multiple buttons with different titles. </p>
  
  <p>I tried binding the button's alternate title to the aforementioned boolean value and in the buttons properties giving the button a Title and an Alternate title, but this didn't work.</p>