message: Fix sigma page don't show error spend message
diff: @@ -87,6 +87,9 @@ WalletView::WalletView(const PlatformStyle *platformStyle, QWidget *parent):
  // Clicking on a transaction on the overview pre-selects the transaction on the transaction history page
  connect(overviewPage, SIGNAL(transactionClicked(QModelIndex)), this, SLOT(focusBitcoinHistoryTab(QModelIndex)));
  connect(overviewPage, SIGNAL(exodusTransactionClicked(uint256)), this, SLOT(focusExodusTransaction(uint256)));
  +
  + // Subscribe message from sigma tab.
  + connect(sigmaPage, SIGNAL(message(QString, QString, unsigned int)), this, SIGNAL(message(QString, QString, unsigned int)));
  }
  WalletView::~WalletView()
  