Include ordernumbers in order search functionality (only order ID is used)
http://open-tools.net/forum/ordernumber-plugin/5392-woocommerce-search-function-not-working.html
Searching for the order ID yields the desired order in the Backend order list view, but the order number does not seem to be searched at all!
=> Do we need to implement a special hook to include the order number in the search?