Bug 866229 - Change - Add a preference for not doing updates in Metro. r=jimm
Bug 866229 - Use metro enabled pref. r=rstrong
Bug 866229 - Hide Metro prefs pre win8. r=rstrong
Bug 866229 - Don't abort when app.update.silent is true and update.showPrompt is true on Metro. r=rstrong
Bug 866229 - Metro pref telemetry. r=rstrong
Bug 874323 - Start updater manually for Metro to apply update. r=rstrong
Bug 874323 - wait longer for app to close for Metro since it launches updater directly. r=rstrong
Bug 874323 - Continue to launch callback when allow set foreground call fails. r=jimm
Merge fx-team to m-c.