SyntaxError: expected expression, got '.'

[iagoalonsomrf]

Stack trace:
  @/home/ialonso/.local/share/gnome-shell/extensions/[email protected]/prefs.js:13:26
  _init@resource:///org/gnome/Shell/Extensions/js/extensionsService.js:204:33
  OpenExtensionPrefsAsync/<@resource:///org/gnome/Shell/Extensions/js/extensionsService.js:122:28
  asyncCallback@resource:///org/gnome/gjs/modules/core/overrides/Gio.js:132:13
  run@resource:///org/gnome/Shell/Extensions/js/dbusService.js:175:20
  main@resource:///org/gnome/Shell/Extensions/js/main.js:19:13
  run@resource:///org/gnome/gjs/modules/script/package.js:222:19
  start@resource:///org/gnome/gjs/modules/script/package.js:206:5
  @/usr/share/gnome-shell/org.gnome.Shell.Extensions:1:17

GNOME Version: 3.36.8
Windowing System: Wayland

Distributor ID:	Ubuntu
Description:	Ubuntu 20.04.5 LTS
Release:	20.04
Codename:	focal

5.15.0-58-generic #64~20.04.1-Ubuntu SMP x86_64 x86_64 x86_64 GNU/Linux

[nlpsuge]

It is unfortunate that currently this extension does not support versions less than gnome-40.

prefs.js is written using gtk4, but gnome 3.36.8 extension system only supports gtk3

Really sorry about it.

Related issue: #37