BHV-14690: MoonScroller: unnecessary focus on paging control

Issue: 'onenter' event in scrollStrategy is giving unexpected focus to
the paging controls.

Fix: updating paging controls based on the existence of current spotted
control.

Enyo-DCO-1.1-Signed-off-by: Srinivas V srinivas.v@lge.com
I think we can simplify this as `!enyo.Spotlight.hasCurrent()`.