ensure ContextualPopup activator position is refreshed appropriately

Issue: ENYO-602
Enyo-DCO-1.1-Signed-off-by: Ryan Duffy (ryan.duffy@lge.com)
Merge pull request #214 from enyojs/ENYO-602-ryanjduffy

Fixes ENYO-602

Reviewed-By: Art Dahm (art.dahm@lge.com)
Integrated-By: Aaron Tam (aaron.tam@lge.com)