:sparkles: Add same item decoration in fuzzy-finder as in tree-view

By adding the same data-attributes in the fuzzy-finder items as in
tree-view items the same css can apply immediately.

![Screenshot](http://i.imgur.com/e7ugyiK.png)
Merge pull request #40 from abe33/feature_finder_icons

:sparkles: Add same item decoration in fuzzy-finder as in tree-view