//bottom
final ToolItem bottom_toolitem = new ToolItem(toolBar, SWT.PUSH);
bottom_toolitem.setToolTipText("Move Rule to Bottom");
bottom_toolitem.setImage(ImageRepository.getImage("bottom"));
bottom_toolitem.setEnabled(false);
bottom_toolitem.addListener(SWT.Selection, new Listener() {
public void handleEvent (Event e){
try{
TableItem[] items = clientTable.getSelection();
if(items.length != 1){
return;