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
class NetworkStyle;
class Notificator;
class OptionsModel;
class PlatformStyle;
class RPCConsole;
class SendCoinsRecipient;
class UnitDisplayStatusBarControl;
class WalletFrame;
class WalletModel;
class HelpMessageDialog;
class ModalOverlay;
namespace interfaces {
class Handler;
class Node;