- Let nbxmpp handle responding to entity caps requests
- Move code into Caps module

Fixes #10044

Otherwise its not really portable if it stores data in the system keyring

The row was initialized with the show value instead of using
the helper function get_connection_status()

Fixes #10035

When this method is called we are already disconnected

Otherwise the resource is changed on first connect which can trigger
the relogin check in the Accounts Dialog