If the main window has been minimized to the taskbar (iconified) calling "Show/Hide", "Send" or "Receive" actions from the tray icon menu has no effect: the main window still minimized.

It seems like a Qt bug similar to that old [one](https://bugreports.qt.io/browse/QTBUG-31117).

Tested platform: Linux Mint 19, Qt 5.9.5 / 5.9.6
{
    if(!walletFrame)
        return false;
    return walletFrame->setCurrentWallet(name);
}
bool BitcoinGUI::setCurrentWalletBySelectorIndex(int index)
{
    QString internal_name = m_wallet_selector->itemData(index).toString();
    return setCurrentWallet(internal_name);
}
void BitcoinGUI::removeAllWallets()
{
    if(!walletFrame)
        return;
    setWalletActionsEnabled(false);
    walletFrame->removeAllWallets();
}
#endif 
void BitcoinGUI::setWalletActionsEnabled(bool enabled)