<!-- Describe the issue -->
Hello evryone, I get nothing when I click in open wallet, I am new to bitcoin and expect to show something.

![BitcoinIssue](https://user-images.githubusercontent.com/39341595/57179721-5024fc00-6e9e-11e9-80dd-af5e4345be48.png)

I'am using Bitcoin Core (both in testnet and mainnet, didn't work) 0.18 on window 10. 

{
    if (!walletFrame) return;
    const QString display_name = walletModel->getDisplayName();
    setWalletActionsEnabled(true);
    rpcConsole->addWallet(walletModel);
    walletFrame->addWallet(walletModel);
    m_wallet_selector->addItem(display_name, QVariant::fromValue(walletModel));
    if (m_wallet_selector->count() == 2) {
        m_wallet_selector_label_action->setVisible(true);
        m_wallet_selector_action->setVisible(true);
    }
}
void BitcoinGUI::removeWallet(WalletModel* walletModel)
{
    if (!walletFrame) return;
    int index = m_wallet_selector->findData(QVariant::fromValue(walletModel));
    m_wallet_selector->removeItem(index);
    if (m_wallet_selector->count() == 0) {
        setWalletActionsEnabled(false);
    } else if (m_wallet_selector->count() == 1) {
        m_wallet_selector_label_action->setVisible(false);
        m_wallet_selector_action->setVisible(false);
    }
    rpcConsole->removeWallet(walletModel);
    walletFrame->removeWallet(walletModel);
    updateWindowTitle();
}
void BitcoinGUI::setCurrentWallet(WalletModel* wallet_model)