WooCommerce Product Vendors 2.2.7

* Tweak - Set Vendor Email field to required and add validation.
* Tweak - Improve clarity of Vendor Email input field description.

* Fix - Avoid double payment of PayPal payouts for virtual products.
* Fix - Commission page bulk action admin notices not displaying.

Fix – Recent Bookings widget missing bookings on Vendor Dashboard.
Fix – Ensure order item exists when displaying meta data on Commissions page.
Fix – Vendor dashboard Sales Summary showing stale analytics after a sale.
Tweak – Hide Bookings Resources tab and Resources checkbox from vendors.
Tweak – Allow 0% commissions to be set on Vendor profiles.