title: Can underline, but not bold text in NSTextView
body: <p>I have an NSDocuments &amp; storyboard app created with the wizard in Xcode 8. In the ViewController Scene I have added a NSTextView. Certain menu items are disabled, such as Bold and Italic.</p>
  
  <p>Looking at the First Responder the actions for bold and italic are not there. Am I supposed to write these methods myself? Is this due to the responder chain not being correctly set up? Why does underline show up but not bold?</p>
  
  <p>Edit: Adding an image to show how I can edit text with the Inspector Bar, but the Format menu does not show the commands I would expect.</p>
  
  <p><a href="https://i.stack.imgur.com/4OtMS.jpg" rel="nofollow"><img src="https://i.stack.imgur.com/4OtMS.jpg" alt="Image showing how I can modify text with the Inspector Bar, but not with the menu, apart from Underlining"></a></p>