Allow to remove an Address Book

[Porkepix]

Is your feature request related to a problem? Please describe.
Delete empty address books due to difficulties adding one.
But this can also be because we need to change the account to sync with.

Describe the solution you'd like
The ability to remove an address book.

Describe alternatives you've considered
Purge everything related to gcontactsync

Additional context
See screenshot of empty accounts added through the setup and that can't be cleared.