Unable to select hex input 
I have setup a colorpicker with a swatch and popover as per the demo
The colour selector and the color presets are able to be clicked, however the hex input cannot.
This only occurs when the popover is in use.

This can be replicated on the http://casesandberg.github.io/react-color/ demo page
**Replicate:**
- Select the color swatch to open the colorpicker
- Attempt to select the hex input

**Expected:**
- To be able to select and input a hex color

**Actual**
- Colorpicker closes, unable to select input.

If the popover element is deleted from the DOM, the input can be selected.
I suspect his is an ordering z-index issue
