There's a few small issues left over from #15450:

* [Focusing](https://github.com/bitcoin/bitcoin/pull/15450#pullrequestreview-282297760) on the `Encrypt Wallet` dialog after clicking `Create Wallet`.
> ```cpp
> m_passphrase_dialog->setWindowModality(Qt::ApplicationModal); 
> m_passphrase_dialog->show();
> ```

* Wallet [name escaping issue](https://github.com/bitcoin/bitcoin/pull/15450#pullrequestreview-282297760):
> This is at least one inconsistency where if you create a wallet with a HTML escaped character in the name, i.e Alice & Bob, then the & will not be shown in some menus / dialogs.

* Nits from this [review](https://github.com/bitcoin/bitcoin/pull/15450#pullrequestreview-284450044). 
{
    
    m_handler_message_box = m_node.handleMessageBox(std::bind(ThreadSafeMessageBox, this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
    m_handler_question = m_node.handleQuestion(std::bind(ThreadSafeMessageBox, this, std::placeholders::_1, std::placeholders::_3, std::placeholders::_4));
}
void BitcoinGUI::unsubscribeFromCoreSignals()
{
    
    m_handler_message_box->disconnect();
    m_handler_question->disconnect();
}
UnitDisplayStatusBarControl::UnitDisplayStatusBarControl(const PlatformStyle *platformStyle) :
    optionsModel(nullptr),
    menu(nullptr)
{
    createContextMenu();
    setToolTip(tr("Unit to show amounts in. Click to select another unit."));
    QList<BitcoinUnits::Unit> units = BitcoinUnits::availableUnits();
    int max_width = 0;
    const QFontMetrics fm(font());
    for (const BitcoinUnits::Unit unit : units)
    {
        max_width = qMax(max_width, GUIUtil::TextWidth(fm, BitcoinUnits::longName(unit)));
    }
    setMinimumSize(max_width, 0);
    setAlignment(Qt::AlignRight | Qt::AlignVCenter);
    setStyleSheet(QString("QLabel { color : %1 }").arg(platformStyle->SingleColor().name()));
}
void UnitDisplayStatusBarControl::mousePressEvent(QMouseEvent *event)