Added option to show dropdown when clicking on the input

[chrisrollins65]

This adds the convenience of being able to see dropdown options without having to type first as long as the input meets the minChars requirement.

It allows it perform a little more like a traditional dropdown while providing all the functionality of this autocomplete extension.

[jrochkind]

Hmm, I'm already getting this behavior in 1.4.10, and wishing I was not, I don't want it. Odd.

[TheJosh]

:+1: This would be excellent.