def list_buffers
      arr = []
      @_buffers_conf.each_with_index do |e, i|
        t = e[:title] || "no title for #{i}"
        #$log.debug "  TITLE is #{e.title} , t is #{t} "
        arr << t
      end
      ix = popuplist arr
      buffer_at ix
    end
def list_buffers
      arr = []
      @_buffers_conf.each_with_index do |e, i|
        t = e[:title] || "no title for #{i}"
        #$log.debug "  TITLE is #{e.title} , t is #{t} "
        arr << t
      end
      ix = popuplist arr
      buffer_at ix
    end
pops up a list of buffers using titles allowing the user to select
 Based on selection, that buffer is displayed.