Woocommerce Split Order 1.8.1

* Fixed - Fix upgrade routines on HPOS

* Added - Add metadata for tracking split origins
* Added - Add support for splitting shipping items
* Added - Add meta box to display split order parts
* Added - Add column to order list showing origin order
* Added - Add links to fill split quantities on modal
* Added - Add database version to system status report
* Changed - Upgrade routines to use action scheduler
* Changed - Move settings to Orders tab
* Changed - Extract suggested meta fields from greater number of orders
* Fixed - Fix copying of order attribution source type
* Fixed - Copy stock reduced status to split parts for all order statuses
* Fixed - Hide suggested meta section in settings if empty
* Fixed - Exclude split parts from suggested meta fields on non-HPOS

* Added - Catch errors occurring during the split and exit gracefully
* Added - Include settings in system status report
* Added - Support order number suffix with Editable Order Numbers
* Added - Copy order attribution meta
* Changed - Delay updating original until new order is created to avoid data loss
* Changed - WC 9.3 compatibility
* Fixed - Fix check for HPOS being enabled
* Fixed - Fix split order button disappearing after recalculating totals
* Fixed - Fix modal sizing

* Changed - WC 7.8 compatibility
* Fixed - Multi-line support for email explanation

* Changed - WC 7.5 compatibility

* Fixed - Fix PHP notice for accessing non-existent property 'base'
* Changed - WC 7.3 compatibility

* Changed - WC 7.2 compatibility

2022-06-21 - version 1.6.1
* Fixed - Fix order number suffix reverting to post id
* Changed - WC 6.6 compatibility

2022-06-01 - version 1.6.0
* Added - Add translation support with pot file
* Added - Add settings link on plugin list
* Added - Add setting for split order status
* Fixed - Fix order numbers always appending suffix
* Changed - Remove options on uninstall
* Changed - WC 6.5 compatibility