BHV-7839: Updated documentation to reflect correct properties for defining "active" items.

Enyo-DCO-1.1-Signed-off-by: Aaron Tam <aaron.tam@lge.com>
Merge pull request #1302 from enyojs/BHV-7839-aarontam

BHV-7839: Updated documentation to reflect correct properties for defining "active" items.

Reviewed-By: Cole Davis (cole.davis@lge.com)