OS X menu items - standard 'preferences' and 'about', plus view menu

I added the standard 'Preferences' and 'About' menu items to the OS X menu bar.

While I was about it, I thought it would be good to populate the menu bar properly on OS X, since it is always shown anyway. It looks bad having an empty menu bar, and we can use it to surface some commands which are otherwise only available by keyboard shortcuts.

I would like to go further with this, but thought I would gauge the opinions of others first.