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
{
        file->addAction(openAction);
        file->addAction(backupWalletAction);
        file->addAction(signMessageAction);
        file->addAction(verifyMessageAction);
        file->addSeparator();
        file->addAction(usedSendingAddressesAction);
        file->addAction(usedReceivingAddressesAction);
        file->addSeparator();
    }
    file->addAction(quitAction);
    QMenu *settings = appMenuBar->addMenu(tr("&Settings"));
    if(walletFrame)
    {
        settings->addAction(encryptWalletAction);
        settings->addAction(changePassphraseAction);
        settings->addSeparator();
    }
    settings->addAction(optionsAction);
    QMenu *help = appMenuBar->addMenu(tr("&Help"));
    if(walletFrame)
    {
        help->addAction(openRPCConsoleAction);
    }
    help->addAction(showHelpMessageAction);
    help->addSeparator();
    help->addAction(aboutAction);
    help->addAction(aboutQtAction);
}
void BitcoinGUI::createToolBars()