The keyboard popover doesn't have a shortcut to open the Keyboard panel from the Settings app.
This commit adds this menu entry to improve usability.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2600>
this.menu.addMenuItem(new PopupMenu.PopupSeparatorMenuItem());
this._showLayoutItem = this.menu.addAction(_("Show Keyboard Layout"), this._showLayout.bind(this));
+ this.menu.addSettingsAction(_('Keyboard Settings'),
+ 'gnome-keyboard-panel.desktop');
Main.sessionMode.connect('updated', this._sessionUpdated.bind(this));
this._sessionUpdated();