This PR is a prerequisite for more thorough testing of filtering in the AddressBookPage class
> qt: No need to force Qt::QueuedConnection for NotifyAddressBookChanged
>
> This change simplifies tests for `AddressBookPage` class.
> No user-faced behavior change.
> qt, test: Add tests for `tableView` in `AddressBookPage` dialog
This is a backport of core-gui#591
Depends on D18164