scroll_down_page (Raggle::Interfaces::NcursesInterface::ListWindow)

    # File raggle, line 3016
            def scroll_down_page
              if $config['page_step'] < 0
                w,h = dimensions
                step = (h - 2) + $config['page_step']
              else
                step = $config['page_step']
              end

              pos = @active_item + step
              pos >= @items.size ? activate(@items.size - 1) : activate(pos)
            end