message: qt, rpc: Do not accept command while executing another one
diff: @@ -166,6 +166,7 @@ private:
  QCompleter *autoCompleter = nullptr;
  QThread thread;
  WalletModel* m_last_wallet_model{nullptr};
  + bool m_is_executing{false};
  /** Update UI with latest network info from model. */
  void updateNetworkState();
  