* Improvement - Compatibility with WordPress 6.3.
* Fix - Some addons missing closing DIV element - breaks layout of the site.
* Fix - gCal for staff not working.
* Improvement - Hidden input forms don't need a label.
* Improvement - Prevent quantity editing for appointable products.
* Fix - Adding appointment in admin to existing order not working.
* Fix - Adding appointment in admin redirect is wrong.
