Noticed this while reviewing #13529, but it's also in master @ 5ba77df15. On macOS 10.13.6:

```
bitcoin-qt -disablewallet
```

<img width="1354" alt="schermafbeelding 2018-08-01 om 16 03 41" src="https://user-images.githubusercontent.com/10217/43526506-b23264d8-95a4-11e8-81a0-5debcad838ae.png">

The usual progress modal doesn't appear when QT starts, and clicking on the progress bar has no effect. It works fine when there's a wallet present.
openOptionsDialogWithTab(OptionsDialog::TAB_NETWORK);
    });
    modalOverlay = new ModalOverlay(this->centralWidget());
#ifdef ENABLE_WALLET
    if(enableWallet) {
        connect(walletFrame, &WalletFrame::requestedSyncWarningInfo, this, &BitcoinGUI::showModalOverlay);
        connect(labelBlocksIcon, &GUIUtil::ClickableLabel::clicked, this, &BitcoinGUI::showModalOverlay);
        connect(progressBar, &GUIUtil::ClickableProgressBar::clicked, this, &BitcoinGUI::showModalOverlay);
    }
#endif
#ifdef Q_OS_MAC
    m_app_nap_inhibitor = new CAppNapInhibitor;
#endif
}
BitcoinGUI::~BitcoinGUI()
{
    
    unsubscribeFromCoreSignals();
    QSettings settings;
    settings.setValue("MainWindowGeometry", saveGeometry());
    if(trayIcon) 
        trayIcon->hide();
#ifdef Q_OS_MAC
    delete m_app_nap_inhibitor;
    delete appMenuBar;
    MacDockIconHandler::cleanup();
#endif
    delete rpcConsole;
}
void BitcoinGUI::createActions()