Seems this was forgotten in the initial commit adding the new indicator.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/3796>
(cherry picked from commit
963fda971fc397dec4d399d1a43f36cde30f84c0)
this._robot.connect('enroll-device', this._onEnrollDevice.bind(this));
this._robot.connect('enroll-failed', this._onEnrollFailed.bind(this));
+ this.connect('destroy', () => this._onDestroy());
+
Main.sessionMode.connect('updated', this._sync.bind(this));
this._sync();