Added support for backbutton event.
Enyo-DCO-1.1-Signed-off-by: Jason Robitaille <jason.robitaille@lge.com>
Temporarily disabled the page visibility stuff as that's not yet included in builds
Fix for empty launch parameters
Fixed syntax in legacy alert popup
Merge pull request #25 from webOS-DevRel/GF-8801-jasonrobitaille

Added support for backbutton event.

Reviewed-By: Ben Combee (ben.combee@lge.com)