Merge #16735: gui: Remove unused menu items for Windows and Linux

f091dc8 GUI: Remove unused menu items for Windows and Linux (GChuf)

Pull request description:

  Removed "Main Window" and "Restore" menu option for Windows and linux
  Keep the options for macOS

ACKs for top commit:
  MarcoFalke:
    unsigned ACK f091dc8
  fanquake:
    ACK f091dc8 - tested on macOS, Windows and Linux.
  MarcoFalke:
    ACK f091dc8
  kristapsk:
    ACK f091dc8 (tested on Linux with Xfce4)

Tree-SHA512: a84a9a8bd3b09224f111cad4712076150524a24d6f09910147194c4149222443c453372db61eed8aa82c3450339b63fd216288196feb4ab637b6ea21b0109830

Author: MarcoFalke

src/qt/bitcoingui.cpp

@@ -471,24 +471,16 @@ void BitcoinGUI::createMenuBar()
     connect(qApp, &QApplication::focusWindowChanged, [zoom_action] (QWindow* window) {
         zoom_action->setEnabled(window != nullptr);
     });
-#else
-    QAction* restore_action = window_menu->addAction(tr("Restore"));
-    connect(restore_action, &QAction::triggered, [] {
-        qApp->focusWindow()->showNormal();
-    });
-
-    connect(qApp, &QApplication::focusWindowChanged, [restore_action] (QWindow* window) {
-        restore_action->setEnabled(window != nullptr);
-    });
 #endif
 
     if (walletFrame) {
+#ifdef Q_OS_MAC
         window_menu->addSeparator();
         QAction* main_window_action = window_menu->addAction(tr("Main Window"));
         connect(main_window_action, &QAction::triggered, [this] {
             GUIUtil::bringToFront(this);
         });
-
+#endif
         window_menu->addSeparator();
         window_menu->addAction(usedSendingAddressesAction);
         window_menu->addAction(usedReceivingAddressesAction);