LPS-42060 - Add visual grouping of repeatable fields in the Dynamic Data Display.

Hey @mjbradford89,

Attached is an update for http://issues.liferay.com/browse/LPS-42060.  Can we move these changes into the theme level, inside of portlet.css or application.css so we can keep the style defined in one place?  

I can see all of these properties quickly deviating from each other.

Please let me know if you have any questions.  Thanks!