Compile master, and run with `src/qt/bitcoin-qt -regtest -nowallet`. As expected, no icon is displayed. Load and unload a wallet. The `HD` icon remains.

On startup:
![on_startup](https://user-images.githubusercontent.com/863730/72410834-711b4c00-37a4-11ea-9a10-bfcf3db7ce68.png)

After a wallet load and unload:
![after_load_unload](https://user-images.githubusercontent.com/863730/72410838-737da600-37a4-11ea-8854-dd13301c0135.png)

action->setEnabled(false);
                    continue;
                }
                connect(action, &QAction::triggered, [this, path] {
                    auto activity = new OpenWalletActivity(m_wallet_controller, this);
                    connect(activity, &OpenWalletActivity::opened, this, &BitcoinGUI::setCurrentWallet);
                    connect(activity, &OpenWalletActivity::finished, activity, &QObject::deleteLater);
                    activity->open(path);
                });
            }
            if (m_open_wallet_menu->isEmpty()) {
                QAction* action = m_open_wallet_menu->addAction(tr("No wallets available"));
                action->setEnabled(false);
            }
        });
        connect(m_close_wallet_action, &QAction::triggered, [this] {
            m_wallet_controller->closeWallet(walletFrame->currentWalletModel(), this);
        });
        connect(m_create_wallet_action, &QAction::triggered, [this] {
            auto activity = new CreateWalletActivity(m_wallet_controller, this);
            connect(activity, &CreateWalletActivity::created, this, &BitcoinGUI::setCurrentWallet);
            connect(activity, &CreateWalletActivity::finished, activity, &QObject::deleteLater);
            activity->create();
        });
    }
#endif 
    connect(new QShortcut(QKeySequence(Qt::CTRL + Qt::SHIFT + Qt::Key_C), this), &QShortcut::activated, this, &BitcoinGUI::showDebugWindowActivateConsole);
    connect(new QShortcut(QKeySequence(Qt::CTRL + Qt::SHIFT + Qt::Key_D), this), &QShortcut::activated, this, &BitcoinGUI::showDebugWindow);
}
void BitcoinGUI::createMenuBar()