Opt in, not Opt out, Hub options

Ok, Musecore 4 is awesome. Seriously, Sibelius and Dorico might be in a bit of trouble with this one. Just good work all around.

But I do have a beef with the hub launcher. Guys, you need to ask permission before installing things into login items and turning peoples PCs into torrent clients. Not doing that is hostile coding. Having yet another thing install into my top bar exasperates a problem I'm already facing where everything and their dog wants a top bar item.

Further in a lot of the developing world where Musecore can make its most important impact in music education amonst students who could never afford something like Dorico, your messing with already limited bandwidths by hijacking bandwidth.

So suggestions: Make the "startup at login" and "Enable community distribution" options opt in. And perhaps make it a little more discoverable as to how we can install the sound library plugins in offline type ways which will be pretty vital in classroom settings.