Bug 1035250 fte connectivity

I dislike coupling FtuLauncher with Statusbar. This will kill us when we want to resolve the dependency issue and the launching sequences.
The future of FtuLauncher is living in the subsystem of mozApps handler. See https://bugzilla.mozilla.org/show_bug.cgi?id=940164.

What you should do here is query FtuLauncher.isFtuRunning() and we will migrate to System.isRunningFtu in bug 940164.

Also I don't think this works. If we are showing an upgraded ftu, we don't want to hide icons by default.