Bug 189694 ApplicationWindow#run() can hang Eclipse due to Menu#isEnabled
In ApplicationWindow#run() we call Menu#isEnabled to cache our enabled state. This actually crawls all of the children of the menu to determine the state. When the Shell is disabled this will return true and so when the shell is re-enabled all of the menus will be inactive. I will be attaching a Steve approved patch.
bundles/org.eclipse.jface/src/org/eclipse/jface/window/ApplicationWindow.java
* </p>
     * 
	 * @param style swt style bits used to create the Coolbar
     * 
     * @return a cool bar manager
     * @since 3.2
     * @see #createCoolBarManager(int)
     */
    protected ICoolBarManager createCoolBarManager2(int style) {
        return createCoolBarManager(style);
    }
    /**
     * Creates the control for the tool bar manager.
     * <p>
     * Subclasses may override this method to customize the tool bar manager.
     * </p>
     * @param parent the parent used for the control
     * @return a Control
     */
    protected Control createToolBarControl(Composite parent) {
        if (toolBarManager != null) {
        	if (toolBarManager instanceof IToolBarManager2) {
				return ((IToolBarManager2) toolBarManager).createControl2(parent);
			}
        	if (toolBarManager instanceof ToolBarManager) {
				return ((ToolBarManager) toolBarManager).createControl(parent);
			}
        }
        return null;
    }