Multi Icon Select
Right now you can click and drag to select multiple icons. However, when you do this it only adds the upper left most icon in the selection.

Maybe allow for multi select to add with "Shift+click" and "command+click" functionality. 

...or don't allow for multi select at all.

![image](https://cloud.githubusercontent.com/assets/5393862/10517815/6cc7b1e8-7313-11e5-8f43-99fe75adee07.png)
