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.
{
    
    openRPCConsoleAction->setEnabled(true);
    aboutAction->setEnabled(true);
    optionsAction->setEnabled(true);
}
#ifdef ENABLE_WALLET
void BitcoinGUI::incomingTransaction(const QString& date, int unit, const CAmount& amount, const QString& type, const QString& address, const QString& label, const QString& walletName)
{
    
    QString msg = tr("Date: %1\n").arg(date) +
                  tr("Amount: %1\n").arg(BitcoinUnits::formatWithUnit(unit, amount, true));
    if (m_node.getWallets().size() > 1 && !walletName.isEmpty()) {
        msg += tr("Wallet: %1\n").arg(walletName);
    }
    msg += tr("Type: %1\n").arg(type);
    if (!label.isEmpty())
        msg += tr("Label: %1\n").arg(label);
    else if (!address.isEmpty())
        msg += tr("Address: %1\n").arg(address);
    message((amount)<0 ? tr("Sent transaction") : tr("Incoming transaction"),
             msg, CClientUIInterface::MSG_INFORMATION);
}
#endif 
void BitcoinGUI::dragEnterEvent(QDragEnterEvent *event)