* Add customer functions to order and refund classes
* Use parent order for refund order number
* Add renderCurrency method to format negative currencies
* Allow negative number of items for refund fields in database
* Ensure consistent inner border between summary items
Switches bottom border to same color as inner right border, except in cases where it is an outer border. Also adjusts right border of last item in unbalanced grid to the same inner border color.
* Set consistent summary item label height
Makes sure that wrapped label doesn't interfere with common item height for grid
* Implements flexbox instead of fixed height labels
* fix indentation
* Add newline
* Update import progress during batches
* Add import status route for querying import progress
* Update import totals before import start
* Move wc admin notes to separate action scheduler group
* Add import totals route to query customer and order totals
* Add wc helper queue job processing method
* Add import status and total tests
* Separate action type clearing for imports and notes
* Typecast action types as array in clear_pending_wcadmin_actions()
* Hide progress bars and status from Import Historical Data screen
* Remove Rebuild Reports Sections from Settings
* Add Delete Imported Data button to the default actions
* Unify @todo comments
* Add customer functions to order and refund classes
* Extract shared order and refund methods to trait
* Add refund filter to advanced filters in orders report
* Filter refund types in orders data store
* Extract refunds subquery to parent report data store method
* Add refund subquery filtering to order stats data store
* Add tests around refund type filtering
* Change the default option for the refunds filter
* Sync refunds on order sync
* Separate order and refund class extensions
* Add customer functions to order and refund classes
* Change products store to work with refund amounts
* Return early for refunds in coupon data store
* Allow refund processing in tax data store
* Remove unused refund amounts from tables and data stores
* Change order counts to parse out refund entries
* Include refunded orders in default queried statuses
* Only process order number filter on shop order post types
* Extract shared order and refund methods to trait
* Fix renamed schedule_single_order_import method
* Bump PHP and WP version requirements