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
try {
                    if (useRedraw) {
                        toolBar.setRedraw(false);
                    }
                    
                    for (int i = toRemove.size(); --i >= 0;) {
                        ToolItem item = (ToolItem) toRemove.get(i);
                        if (!item.isDisposed()) {
                            Control ctrl = item.getControl();
                            if (ctrl != null) {
                                item.setControl(null);
                                ctrl.dispose();
                            }
                            item.dispose();
                        }
                    }
                    
                    IContributionItem src, dest;
                    mi = toolBar.getItems();
                    int srcIx = 0;
                    int destIx = 0;
                    for (Iterator e = clean.iterator(); e.hasNext();) {
                        src = (IContributionItem) e.next();
                        
                        if (srcIx < mi.length) {
							dest = (IContributionItem) mi[srcIx].getData();
						} else {
							dest = null;
						}
                        if (dest != null && src.equals(dest)) {