Added check that product has been requested in WC_Query.product_query.

When requesting taxonomy term archive for your custom post type and that
taxonomy is shared with product post type, post_type query variable gets
rewritten.
Add 'woocommerce_product_short_description_editor_settings' filter to allow modification of the settings for the wp_editor in the product short description meta-box.
Merge pull request #4582 from rpeshkov/shared_taxonomy_fix

Added check that product has been requested in WC_Query.product_query.
Merge pull request #4583 from emzo/product-short-description-editor-settings

Filter to allow modification of wp_editor settings for product short description
Allow gateways to change the checkout place order button text on selection. Closes #4573
Checkout min
Change featured image notation to product Closes #4586
Check for the term object
Merge pull request #4569 from helgatheviking/master

add apply_filters to the product filters on the edit.php screen
Ensure gateways get loaded prior to emailing out Closes #4577