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
QApplication::setWindowIcon(networkStyle->getTrayAndWindowIcon());
    setWindowIcon(networkStyle->getTrayAndWindowIcon());
    setWindowTitle(windowTitle);
    rpcConsole = new RPCConsole(node, _platformStyle, 0);
    helpMessageDialog = new HelpMessageDialog(node, this, false);
#ifdef ENABLE_WALLET
    if(enableWallet)
    {
        
        walletFrame = new WalletFrame(_platformStyle, this);
        setCentralWidget(walletFrame);
    } else
#endif 
    {
        /* When compiled without wallet or -disablewallet is provided,
         * the central widget is the rpc console.
         */
        setCentralWidget(rpcConsole);
    }
    
    setAcceptDrops(true);
    
    
    createActions();
    
    createMenuBar();
    
    createToolBars();
    
    if (QSystemTrayIcon::isSystemTrayAvailable()) {