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)

{
    if(!clientModel)
        return;
    HelpMessageDialog dlg(m_node, this, true);
    dlg.exec();
}
void BitcoinGUI::showDebugWindow()
{
    GUIUtil::bringToFront(rpcConsole);
    Q_EMIT consoleShown(rpcConsole);
}
void BitcoinGUI::showDebugWindowActivateConsole()
{
    rpcConsole->setTabFocus(RPCConsole::TabTypes::CONSOLE);
    showDebugWindow();
}
void BitcoinGUI::showHelpMessageClicked()
{
    helpMessageDialog->show();
}
#ifdef ENABLE_WALLET
void BitcoinGUI::openClicked()
{
    OpenURIDialog dlg(this);
    if(dlg.exec())
    {
        Q_EMIT receivedURI(dlg.getURI());
    }
}
void BitcoinGUI::gotoOverviewPage()