Bug#818932: [gnome-online-accounts] Can't add new online accounts

[David Glover-Aoki]

This may be an issue with the default NetworkManager configuration.

By default, NetworkManager won’t touch the default wired ethernet connection because it’s listed in /etc/network/interfaces. As a consequence, it thinks the system is “offline”. I think this is greying out the “add” buttons. (It also breaks Evolution.)

Performing the config changes listed in https://wiki.debian.org/NetworkManager causes both of these problems to be fixed.

This should probably be the default configuration.