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.
});
    connect(qApp, &QApplication::focusWindowChanged, [restore_action] (QWindow* window) {
        restore_action->setEnabled(window != nullptr);
    });
#endif
    if (walletFrame) {
        window_menu->addSeparator();
        QAction* main_window_action = window_menu->addAction(tr("Main Window"));
        connect(main_window_action, &QAction::triggered, [this] {
            GUIUtil::bringToFront(this);
        });
        window_menu->addSeparator();
        window_menu->addAction(usedSendingAddressesAction);
        window_menu->addAction(usedReceivingAddressesAction);
    }
    window_menu->addSeparator();
    for (RPCConsole::TabTypes tab_type : rpcConsole->tabs()) {
        QAction* tab_action = window_menu->addAction(rpcConsole->tabTitle(tab_type));
        connect(tab_action, &QAction::triggered, [this, tab_type] {
            rpcConsole->setTabFocus(tab_type);
            showDebugWindow();
        });
    }
    QMenu *help = appMenuBar->addMenu(tr("&Help"));
    help->addAction(showHelpMessageAction);
    help->addSeparator();
    help->addAction(aboutAction);
    help->addAction(aboutQtAction);
}
void BitcoinGUI::createToolBars()