- nm: allow disconnection of all device types
    - nm: ensure that wired connections are torn down when their hardware goes
        away
    - nm: fix crash when canceling a VPN's request for secrets
    - editor: fix issues changing connections between system and user scopes
    - editor: ensure changes are thrown away when editing is canceled
    - applet: ensure connection changes are noticed by NetworkManager
    - applet: fix crash when creating new connections
    - applet: actually use wired 802.1x secrets after they are requested