[BUG]: Endless adding icons about gnome-shell-extension-system-monitor HOT 2 OPEN

_handleActivityChange(settings, key) {
  let meters = this._meters;
  let event_id = this._settings.connect('changed::' + type, function(settings, key) {
      let is_enabled = settings.get_boolean(key);
      if (is_enabled) {
          let icon = that._createIcon(type);
          that._createMeterWidget(type, icon);
      } else {
          that._destroyIcon(type);
          that._destroyMeterWidget(type);
      }
  });
  this._initIconsAndWidgets();
}