Corrected position of image assets in IconButtons when inside a spotlighted element.

Enyo-DCO-1.1-Signed-off-by: Blake Stephens <blake.stephens@lge.com>
Merge pull request #1625 from enyojs/BHV-14505-blakestephens

BHV-14505: Corrected position of image assets in IconButtons when inside a spotlighted element.