Bug 1066206 - [Search] When user tried to add a Rocketbar result to the homescreen the page opens silently in the background

https://bugzilla.mozilla.org/show_bug.cgi?id=1066206
I dislike the timer...I think we could
* Add it back when activity is closed (listen to activityclosing on searchWindow.element)
* Or we could just ignore open-app when searchWindow has frontWindow.