WooCommerce API Manager 3.4.1

* Fix: Email address search on API Customer dashboard.
* Fix: Enter the page number and hit enter to go to that page on API Customer dashboard.

* Fix: API Key activations not displayed when Product Order API Key hidden in api-keys.php template.
* Fix: Product ID column table header text wrapped when it should not be in the api-keys.php template.
* Fix: Release Date column table header text wrapped when it should not be in the api-downloads.php template.
* Update: Updated templates/myaccount/api-keys.php.
* Update: Updated templates/myaccount/api-downloads.php.php.
* New: Settings page link to API Manager > API Customers submenu.

* Tweak: Move translate pre 2.0 legacy String Product ID to a post 2.0 integer Product ID event before the Product ID is processed by the API endpoints for a faster API response to legacy requests.
* Fix: A denial of API endpoint access due to a check of an integer Product ID rather than a legacy String Product ID