Bug 243758 [Contributions] Accelerators in menus are not installed until menu shown
bundles/org.eclipse.jface/src/org/eclipse/jface/window/ApplicationWindow.java
* <ul>
 *   <li>creating an instance of <code>ApplicationWindow</code>
 *   </li>
 *   <li>assigning the window to a window manager (optional)
 *   </li>
 *   <li>opening the window by calling <code>open</code>
 *   </li>
 * </ul>
 * Only on the last step, when the window is told to open, are
 * the window's shell and widget tree created. When the window is
 * closed, the shell and widget tree are disposed of and are no longer
 * referenced, and the window is automatically removed from its window
 * manager. Like all windows, an application window may be reopened.
 * </p>
 * <p>
 * An application window is also a suitable context in which to perform 
 * long-running operations (that is, it implements <code>IRunnableContext</code>).
 * </p>
 */
public class ApplicationWindow extends Window implements IRunnableContext {
    /**
     * Menu bar manager, or <code>null</code> if none (default).
     *
     * @see #addMenuBar
     */
    private MenuManager menuBarManager = null;
    /**
     * Tool bar manager, or <code>null</code> if none (default).
     *
     * @see #addToolBar