UI Improvements
Was a fan of your last plugin, so of course I'll be commenting on this one as well :stuck_out_tongue_closed_eyes: 

The current UI doesn't move. There is no way to drag that window. Anyway that could be possible?

![screen shot 2015-09-14 at 2 34 06 pm](https://cloud.githubusercontent.com/assets/1239557/9862431/b3cf4da0-5aed-11e5-8245-d94b54ca5d90.png)

Along with adding "Search" into this view, is it possible to either limit the number of selections (right now you can select multiple things) and only let people add one icon. Or what would be better, to be able to add multiple icons if you can select multiple. 
