ENYO-2431: Updated enyo.design for enyo.Repeater filterLevel setting

Enyo-DCO-1.1-Signed-off-by: Yves Del Medico <yves.del-medico@hp.com>
Merge pull request #299 from enyojs/ENYO-2431

ENYO-2431: Updated enyo.design for enyo.Repeater filterLevel setting