BHV-728: Prevent sending onSpotlightContainerLeave when not actually leaving container.

Enyo-DCO-1.1-Signed-off-by: Aaron Tam <aaron.tam@lge.com>
Merge pull request #121 from enyojs/BHV-728-aarontam

BHV-728: Prevent sending onSpotlightContainerLeave when not actually leaving container.

Reviewed-By: Ben Combee (ben.combee@lge.com)