docs: def stateNames(self):
          """Returns:
               list: the names of all saved sessions
          """
  #         if self.current_session:
          s = self.tmp_dir_session
          l = [x for x in s.listdir() if s.join(x).isdir()]
          naturalSorting(l)
          # else:
          #    l=[]
          # bring autosave to first position:
          if 'autoSave' in l:
              l.remove('autoSave')
              l.insert(0, 'autoSave')
          return l