MenuBar: fixed menu selectio/focus issue
MenuBar: fixed menu selectio/focus issue

* Menubar is not focusable, so our check for Is Focusable will never be
  true.
* Menubar now has normal behaviour again. When you click, a menu opens,
  click again and menu closes.
* Click to open menu and then move mouse over other menus, opens other
  popup menus.

I can't believe this bug was over a year old!!! :-/

wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI