ENYO-1885: Extend NewDataList.scrollToItem...
ENYO-1885: Extend NewDataList.scrollToItem...

...to add a `focus` option. When `focus` is true, the item will
be Spotlight focused in addition to being scrolled into view.

Enyo-DCO-1.1-Signed-Off-By: Gray Norton (gray.norton@lge.com)

enyojs/moonstone