_mcd_account_set_connection_status: emit change notifications for all related properties
_mcd_account_set_connection_status: emit change notifications for all related properties

If the ConnectionStatus changes, we should put the Connection in the
signal too, even if its value hasn't actually changed - it makes the
signal easier to interpret.

freedesktop-unofficial-mirror/telepathy__telepathy-mission-control,freedesktop-unofficial-mirror/telepathy__telepathy-mission-control,freedesktop-unofficial-mirror/telepathy__telepathy-mission-control,freedesktop-unofficial-mirror/telepathy__telepathy-mission-control