EGO027 warning

owned object references should be released in disable()

Owned references that are cleaned up in `disable()` should also be released with `null` or `undefined`.

Destroy all objects

• extension.js:20

          this._a11ySettings = new Gio.Settings({
              schema_id: `org.gnome.desktop.a11y.applications`,
          })

• extension.js:23

          this._magnifierSettings = new Gio.Settings({
              schema_id: `org.gnome.desktop.a11y.magnifier`,
          })

• lib/preferences.js:48

  this._settings = ExtensionUtils.getSettings()

EGO015 warning

signals connected by extension should be disconnected in disable()

Signals assigned in `enable()` are missing matching disconnect calls in `disable()` or its helper methods.

Disconnect all signals

• prefs.js:34

          keyController.connect(`key-pressed`, (...[, keyval, keycode, state]) => {
              switch (keyval) {
                  case Gdk.KEY_Escape: {
                      this.close();
                      return Gdk.EVENT_STOP;
                  }
                  case Gdk.KEY_BackSpace: {