ENYO-3600: Add to PGB UI the ability to define multiple instances of Acces rows.

Link to the JIRA ticket: https://enyojs.atlassian.net/browse/ENYO-3600

Ready for review.

Tested on Chrome(Windows 7)
Enyo-DCO-1.1-Signed-off-by: Rafik Adiche mahmoud-rafik.adiche@hp.com