Bug 155650 [Preferences] Accessibility: Tab can't access to the "Forward to..." Split button on Preferences window
Steps to reproduce bug: 1.Launch Eclipse 3.2. 2.Goto Preferences window. 3.Select 'Java' (or anyother) on the left pane. 4.Then select 'Help' (or anyother) on the left pane. 5.Click the right-top split button 'Back to Java'. 6.Use Tab Key to access to navigate the control. DEFECT: Notice that you cannot navigate to the navigation-split button.
bundles/org.eclipse.jface/src/org/eclipse/jface/action/ToolBarManager.java
*/
public class ToolBarManager extends ContributionManager implements
		IToolBarManager {
	/**
	 * The tool bar items style; <code>SWT.NONE</code> by default.
	 */
	private int itemStyle = SWT.NONE;
	/**
	 * The tool bat control; <code>null</code> before creation and after
	 * disposal.
	 */
	private ToolBar toolBar = null;
	/**
	 * The menu manager to the context menu associated with the toolbar.
	 * 
	 * @since 3.0
	 */
	private MenuManager contextMenuManager = null;
	/**
	 * Creates a new tool bar manager with the default SWT button style. Use the
	 * <code>createControl</code> method to create the tool bar control.
	 */
	public ToolBarManager() {
		
	}
	/**
	 * Creates a tool bar manager with the given SWT button style. Use the
	 * <code>createControl</code> method to create the tool bar control.
	 * 
	 * @param style