Serious side effect of #6299 (silencing salut so gabble can connect)

[Morgan Collett]

Dafydd Harries wrote:
> There is still a problem there: when you hit the Share button, there might not
> be a connection that you can use for collaboration. The activity can tell that
> this is the case, but can't tell when sharing does become available.
> 
> Ideally, we would enable and disable the sharing button at appropriate times.
> 
> I agree we should delay as much initialisation as possible if it saves us
> startup time.

Tomeu logged this as #6471.