* Added handle order/subscription item addition and removal

* Added add support for partial order refund

* Updated POT file

* Fixed group field selector returns empty result for shop manager

* Fixed update select2 version to full version to fix conflict issue

* Fixed conflict with other plugin because we didn't check if array index exists

* Fixed remove user login notice and change the logic by always enable registration setting if user cart contains LD course/group

* Fixed login notice always appear on cartflows checkout

Fixed require login notice always appear on some themes that don't pass createaccount input data

* Added course/group access support for restore/delete/trash subscription customer charge updates

* Added customer charge handler to handle course/group enrollment logic based on customer charge and subscriptio status

* Updated re-enroll users to course/group if order is marked as processing (payment received) or completed

* Updated select2 field styles

* Updated move scripts and styles to dedicated folder and rename the filename plus add select2 lib files

* Updated: add scripts registration and deregistration methods and add logic to load scripts conditionally

* Fixed simultaneous simple and subscription product order doesn't enroll user to simple product course

* Fixed allowing guest checkout with course products preventing enrollment in associated course

Fixed checking logic to prevent errors

Fixed courses being added to users with the incorrect payment status. Courses are now only added on processing or complete rather than on hold or pending

* Added new added order item to existing order will trigger course enrollment

* Fixed retroactive tool and some variables are not compatible with WC 5.6

* Fixed retroactive tool doesn't honor the expired subscription course removal setting

* Fixed renewal subscription payment reset access date for expired courses