Start initscan when enabling mux

[clandmeter]

see subject.

[adamsutton]

Agreed

[adamsutton]

Actually I've been thinking about this some more. I'm not sure it's the right thing to do. It really depends on the circumstances. I think instead of doing this, what I will do is add the option to re-introduce muxes into the scanning Q, as per your other request.