WooCommerce Product Vendors 2.2.8

* Fix - Product search not displaying results.
* Fix - Vendors not able to attach image to product.
* Fix - Vendors not able to add Bookings global availability rules.
* Fix - Prevent vendors from seeing vendor filter on products page.
* Fix - Correctly calculate commission for multiple vendor items in email.
* Fix - In WC 3.2, resend order email to vendor no longer works.
* New - Filter to allow hiding the commission shown to vendors on new order email.

* Fix - Per Product Shipping not inserting for merchant admin.
* Fix - PHP7 non numeric cast notice.
* Fix - Booking settings in products showing when bookings not enabled for vendors.
* Fix - Per product shipping tax calculated when product is set to not taxable.
* Fix - Commission field not saving on subscription products.

* Fix - Per Product Shipping undefined index notice.
* Fix - Vendor user not allowed to edit products.
* Fix - Vendors have access to shop orders page.