Issue when closing the dropdown

[mllamazares]

If you open the dropdown and then you press the input to close it, you can't. It close and open very quickly.

You can see the effect in the following fiddle:
http://jsfiddle.net/cHxcZ/10/

[brianreavis]

Duplicate of #75. A fix for this is about 90% done along with some improvements on focus handling.