Feature Request: Ability to mix a nested list with simple options

[johnbland-wf]

Re: http://autocompletejs.com/examples#1003.

In the following setup, I'd like to mix the ability to choose sub-options with being able to select just the top level option. In this example, you can see there is a select with a sub-option selected then Meats doesn't: http://screencast.com/t/Hmc8geEjJdJ.

I'm looking for the option to have the following: Fruits:Apple Meats Meats:Hamburger

Of course, for food, that doesn't make sense but that's the idea. :)

(great preso tonight, BTW)