Admin Columns Pro - WooCommerce Addon 3.7.3

* [Added] Product Variation column: Tax Class
* [Added] Product Variation column: Shipping Class
* [Added] Default Form Values column
* [Added] Correct export for the First and Last Order column on the User list page
* [Fixed] Make it possible to set a Shipping Class with editing when there is not yet a class set
* [Fixed] Smart Filtering for the column Coupons Used did not work correctly
* [Fixed] Smart Filtering drop-down box now searches correctly for the Product Taxonomy column on the Product Variation list table

* [Fixed] The customer column gave an error since last update
* [Improved] Smart Filtering for product variation works now for taxonomy attributes

* [Changed] Leave the scheduled date the same if it is not selected during editing the (Sales) Price
* [Fixed] The 'Link to' setting for the Customer column does now link to the correct page
* [Fixed] Show all records for users in the Orders column