feature request: Disconnect when quit

[Ledenel]

I join many different networks. Since there's only "Disconnect" button here, I have to remember to check all networks and disconnect which I don't really trust before I quit the UI. When the UI has been closed, it can be easily forgotten that I'm still in that untrusted network thus been vulnerable to potential attacks.

I think a "Disconnect when quit" button is better.

ZeroTier 1.10.1
Windows 10