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.
trayIconMenu->addSeparator();
        trayIconMenu->addAction(openRPCConsoleAction);
    }
    trayIconMenu->addAction(optionsAction);
#ifndef Q_OS_MAC 
    trayIconMenu->addSeparator();
    trayIconMenu->addAction(quitAction);
#endif
}
#ifndef Q_OS_MAC
void BitcoinGUI::trayIconActivated(QSystemTrayIcon::ActivationReason reason)
{
    if(reason == QSystemTrayIcon::Trigger)
    {
        
        toggleHidden();
    }
}
#else
void BitcoinGUI::macosDockIconActivated()
{
    show();
    activateWindow();
}
#endif
void BitcoinGUI::optionsClicked()
{
    openOptionsDialogWithTab(OptionsDialog::TAB_MAIN);
}
void BitcoinGUI::aboutClicked()