Create woocommerce-uk_UA.po

Ukrainian language
Fix markup on form-pay.php

Payment method fields were not displaying on the "Checkout -> Pay" page
because checkout.js was using a input#payment_method_{name} selector, which
worked fine with the payment method markup used in the review-order.php template,
but not with the markup used in the form-pay.php template.

This moves the #payment_method_{name} attribute from the <li/> elements to the
<input/> element so that checkout.js correctly display's payment method fields.
We'll let autoload handle this file loading

Revert: 1428bf8f9c8f9f876263386ada695375c6fc8d7d
Fix use of __CLASS__ when not in class
Merge pull request #4049 from thenbrent/fix_deprecated_class

Fix use of `__CLASS__` when not in class
Add a custom trigger handler based on the value of select#field_to_edit
Merge pull request #4045 from scottbasgaard/master

Class name consistency for woocommerce_attributes > product_attributes. ...
Merge pull request #4047 from thenbrent/form_pay_fix

Fix markup on form-pay.php
Fixed docblock return type, closes #4057
Fixed docs for enabled params (string, not bool), closes #4052
Schema: ProductID can now be SKU, added URL
Ukrainian language
Merge pull request #4060 from AndriyGusak/master

Ukrainian language
payment heading
removing extra slashes when order meta is saved in admin
action, not filter
add ons layout. closes #4044
sort / add account. #4042
product data handle #4042
reports #4042