Stock filter variations support

This BETA option enables stock filter support for variable products. Stock availabilities will be filtered based on variations’ stock status, in combination with other active filters.

The Stock filter variations support option may slow down the product lists display on sites with slow servers and/or large amounts of products. It may NOT work properly in shops with more that 10000 products.

This option supports the WooCommerce > Settings > Products > Inventory > Out of stock visibility setting. Whenever the Hide out of stock items from the catalog option is checked, the products with out of stock status will not be displayed in the filtered product lists.
The Out of stock filter on the other hand, will display out of stock products even with Out of stock visibility enabled.