ENYO-3914: Hide play image overlay when programmatically played, general cleanup.

Enyo-DCO-1.1-Signed-off-by: Aaron Tam <aaron.tam@lge.com>
Merge pull request #685 from enyojs/ENYO-3914-aarontam

ENYO-3914: Hide play image overlay when programmatically played, general cleanup.

Reviewed-By: Ben Combee (ben.combee@lge.com)