Fix g_object_set() call.
Improve Service callbacks.
Small updates.
Implement constructor for incomming connections and improve error handling.
Add new version of ParticipantCore::create_connection_participant_role() wrapping second ConnectionParticipantRole constructor.
Implement Service::on_tcp_service_new_connection_callback() and add improve error handling in few places.
Propagate errors in
ParticipantCore::create_connection_participant_role().
Improve MainWindow::ParticipantRow::update().
Implement ConnectParticipantRole::disconnect().
Implement Service::on_main_window_participant_disconnect_callback().
Handle ConnectionParticipantRole::Status::DISCONNECTING in MainWindow::ParticipantRow::update().