docs: def reset_bars(self):
          """
          Set all progress bars to zero and hide them.
          """
          self.url_progressbar.reset()
          self.url_progressbar.show([0, 0])
  
          self.issn_progressbar.reset()
  
          self.urlbox_error.reset()
          self.issnbox_error.reset()
  
          InputController._reset_typeaheads()