message: qt: Call setParent() in the parent's context
  setParent(parent) calls sendEvent(parent, QChildEvent) that implies
  running in the thread which created the parent object.
diff: @@ -131,7 +131,11 @@ WalletModel* WalletController::getOrCreateWallet(std::unique_ptr<interfaces::Wal
  WalletModel* wallet_model = new WalletModel(std::move(wallet), m_client_model, m_platform_style, nullptr);
  // Handler callback runs in a different thread so fix wallet model thread affinity.
  wallet_model->moveToThread(thread());
  + // setParent(parent) must be called in the thread which created the parent object. More details in #18948.
  + GUIUtil::ObjectInvoke(this, [wallet_model, this] {
  wallet_model->setParent(this);
  + }, GUIUtil::blockingGUIThreadConnection());
  +
  m_wallets.push_back(wallet_model);
  // WalletModel::startPollBalance needs to be called in a thread managed by
  