Upgrading from 8.x-1.6 to 2.1.0-beta2 removes the labels from pwa_extras admin configuration

@pasan.gamage, I have updated the options code, and this solution resolves the field option labels in the configuration form.

Thanks for the patch in #2. It worked for me.

Thanks! Although, let's use "Html::escape()" instead and do the escaping inside the function itself instead of the render array entry.

Done, please review.

Well done @Grevil, thanks!

Merged into dev

Automatically closed - issue fixed for 2 weeks with no activity.