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 (!walletFrame) return;
    walletFrame->setCurrentWallet(wallet_model);
    for (int index = 0; index < m_wallet_selector->count(); ++index) {
        if (m_wallet_selector->itemData(index).value<WalletModel*>() == wallet_model) {
            m_wallet_selector->setCurrentIndex(index);
            break;
        }
    }
    updateWindowTitle();
}
void BitcoinGUI::setCurrentWalletBySelectorIndex(int index)
{
    WalletModel* wallet_model = m_wallet_selector->itemData(index).value<WalletModel*>();
    if (wallet_model) setCurrentWallet(wallet_model);
}
void BitcoinGUI::removeAllWallets()
{
    if(!walletFrame)
        return;
    setWalletActionsEnabled(false);
    walletFrame->removeAllWallets();
}
#endif 
void BitcoinGUI::setWalletActionsEnabled(bool enabled)