Bug 123207 PropertyHandle items cannot be moved down
Use the property handle to move down the item. It seems not work.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/dialogs/PropertyHandleTableViewer.java
return viewer;
    }
    
    public Composite getControl()
    {
        return mainControl;
    }
    
    public Button getUpButton()
    {
        return btnUp;
    }
    
    public Menu getMenu()
    {
        return menu;
    }
    
    public Button getDownButton()
    {
        return btnDown;
    }
    
    public Button getRemoveButton()
    {
        return btnRemove;
    }
    
    public MenuItem getRemoveMenuItem()
    {