new ToolItem(tb,SWT.SEPARATOR);
refreshItem = new ToolItem(tb,SWT.NONE);
refreshItem.setText("Refresh");
refreshItem.setImage(Activator.getImageDescriptor("icons/reload_32.png").createImage());
refreshItem.addSelectionListener(this);
tb.pack();
sc = new StuffComposite(parent,SWT.NONE);
sc.setLayoutData(new GridData(GridData.FILL_BOTH));
sc.getTv().addSelectionChangedListener(this);