Backport - As a Marketer, I want to see icons for each of the characteristics

Icons are static and supplied by the developer. As part of this story, show the icons in the persona editing tab.

Pivotal story: https://www.pivotaltracker.com/story/show/46799907

Icons can be found in the zip file of the story "As a Marketer, I want to use a good-looking characteristics tab": https://www.pivotaltracker.com/story/show/46449391.