code: def on_reset_compat_defaults_clicked(self, bnt):
          
          self.settings.general.reset('compat-backspace')
          self.settings.general.reset('compat-delete')
          self.reload_erase_combos()
docs: Reset default values to compat_{backspace,delete} dconf
          keys. The default values are retrivied from the guake.schemas
          file.