Win/Java: Don't let F10 set KB focus to sys menu

I'm not sure when Windows 10 started hijacking the F10 key to serve the
same purpose as the left Alt key (activating the system menu), but it
must have been recently.  (In the process of integrating/implementing
the server-side key mapping feature in TurboVNC 3.1, I thoroughly tested
all possible keystrokes on Windows, macOS, and Linux clients.)

This commit simply extends the fix in
579f2d7 to cover the F10 key as well.

ChangeLog.md

@@ -34,10 +34,10 @@ sequences are also used by Emacs and GNOME.  Thus, the Java TurboVNC Viewer now
 sends those key sequences to the server if no scrollbars are visible or if
 keyboard grabbing is enabled.
 
-7. Fixed an issue in the Windows/Java TurboVNC Viewer whereby a left Alt key
-press, followed by a left Alt key release, caused the keyboard focus to be
-redirected to the system menu, and subsequent keystrokes were consumed by the
-system menu until left Alt or Esc was pressed to dismiss the menu.
+7. Fixed an issue in the Windows/Java TurboVNC Viewer whereby pressing and
+releasing the left Alt or F10 key caused the keyboard focus to be redirected to
+the system menu, and subsequent keystrokes were consumed by the system menu
+until left Alt, F10, or Esc was pressed to dismiss the menu.
 
 8. Fixed a regression introduced by 2.2 beta1[7] that prevented the idle
 timeout feature in the TurboVNC Server from working properly.

java/com/turbovnc/vncviewer/DesktopWindow.java

@@ -1,8 +1,8 @@
 /* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
  * Copyright (C) 2006 Constantin Kaplinsky.  All Rights Reserved.
  * Copyright (C) 2009 Paul Donohue.  All Rights Reserved.
- * Copyright (C) 2010, 2012-2013, 2015-2018, 2020-2022 D. R. Commander.
- *                                                     All Rights Reserved.
+ * Copyright (C) 2010, 2012-2013, 2015-2018, 2020-2022, 2024
+ *           D. R. Commander.  All Rights Reserved.
  * Copyright (C) 2011-2013 Brian P. Hinz
  *
  * This is free software; you can redistribute it and/or modify
@@ -101,8 +101,9 @@ static final double getTime() {
       private final KeyEventDispatcher keyEventDispatcher =
         new KeyEventDispatcher() {
         public boolean dispatchKeyEvent(KeyEvent e) {
-          if (e.getKeyCode() == 18 &&
-              e.getKeyLocation() == KeyEvent.KEY_LOCATION_LEFT) {
+          if ((e.getKeyCode() == 18 &&
+               e.getKeyLocation() == KeyEvent.KEY_LOCATION_LEFT) ||
+              e.getKeyCode() == 121) {
             if (e.getID() == KeyEvent.KEY_PRESSED)
               cc.desktop.keyPressed(e);
             else if (e.getID() == KeyEvent.KEY_RELEASED)