fix(blur): item now exits on blur.

![dfertert](https://cloud.githubusercontent.com/assets/1904925/4499442/e789fcc0-4a82-11e4-89e7-0c171c8f380d.gif)

https://battlefy.atlassian.net/browse/BATTLEFY-1968
So, a bit of context here, `on-blur` will only work if the `tabindex` attribute is added. :cat: