def goto_next_selection
      return if selected_rows().length == 0 
      row = selected_rows().sort.find { |i| i > @obj.current_index }
      row ||= @obj.current_index
      #@obj.current_index = row
      @obj.goto_line row
    end
def goto_next_selection
      return if selected_rows().length == 0 
      row = selected_rows().sort.find { |i| i > @obj.current_index }
      row ||= @obj.current_index
      #@obj.current_index = row
      @obj.goto_line row
    end
after selecting, traverse selections forward