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
srcIx++;
                            destIx++;
                            continue;
                        }
                        if (dest != null && dest.isSeparator()
                                && src.isSeparator()) {
                            mi[srcIx].setData(src);
                            srcIx++;
                            destIx++;
                            continue;
                        }
                        int start = toolBar.getItemCount();
                        src.fill(toolBar, destIx);
                        int newItems = toolBar.getItemCount() - start;
                        for (int i = 0; i < newItems; i++) {
                            ToolItem item = toolBar.getItem(destIx++);
                            item.setData(src);
                        }
                    }
                    
                    for (int i = mi.length; --i >= srcIx;) {
                        ToolItem item = mi[i];
                        if (!item.isDisposed()) {
                            Control ctrl = item.getControl();
                            if (ctrl != null) {
                                item.setControl(null);
                                ctrl.dispose();
                            }
                            item.dispose();
                        }