LPS-34669 - Add visual grouping of repeatable fields in the web contents

Hey @pei-jung,

Attached is an update for http://issues.liferay.com/browse/LPS-34669.  Can we make some updates to this since this current fix would only apply to newer browsers.  We should update this in the JSP to use a class name such as alt for alternating rows (possibly using a mod % i style approach (we do this similarly in the search container for alternating rows on the CSS class).

Please let me know if you have any questions.  Thanks!