WooCommerce Waitlist 2.4.16

* Fix: duplicate admin notices from archive pages
* Fix: moved archiving function to after user is unregistered instead of after notifications are sent
* Fix: Waitlist links not always working on custom archive pages
* Fix: 'confirm' string not getting translated properly
* Updated create customer functionality to utilise wc_create_customer throughout plugin
* Updated options to include setting to retain data when deleting the plugin
* Added support for WC Brand archive pages

* Fix: Ensure waitlist users who purchase the product are always removed from the waitlist
* Fix: Admin email notifications not going out when customer joins waitlist
* Moved setting for admin email address over to the email settings page

* Fix: CSV export not processing "#" character (currently removing this character from product title)