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
trayIconMenu->addSeparator();
        trayIconMenu->addAction(openRPCConsoleAction);
    }
    trayIconMenu->addAction(optionsAction);
#ifndef Q_OS_MAC 
    trayIconMenu->addSeparator();
    trayIconMenu->addAction(quitAction);
#endif
}
#ifndef Q_OS_MAC
void BitcoinGUI::trayIconActivated(QSystemTrayIcon::ActivationReason reason)
{
    if(reason == QSystemTrayIcon::Trigger)
    {
        
        toggleHidden();
    }
}
#else
void BitcoinGUI::macosDockIconActivated()
{
    show();
    activateWindow();
}
#endif
void BitcoinGUI::optionsClicked()
{
    openOptionsDialogWithTab(OptionsDialog::TAB_MAIN);
}
void BitcoinGUI::aboutClicked()