WooCommerce Custom Fields 2.3.4

* Fix - Per-character fee calculation issue related to unicode characters
* Fix - Archived fields appear in the main field list in admin area
* Fix - Product sale price display issue
* Tweak - Improved performance of product pages when prices are changed
* Tweak - Checked compatibility with the latest versions of WordPress and WooCommerce
* Tweak - Other minor bug fixes and improvements
* Dev - Removed last argument from filter hook wccf_skip_product_fields_for_product
* Dev - Removed last argument from filter hook wccf_skip_pricing_for_product
* Dev - Some changes to internal methods, check if you call internal methods

* Fix - Required field error displayed when "any" attribute variation is selected
* Fix - Non-sale price formatted as sale price under specific conditions
* Fix - Problem with filter hook wccf_product_fields_position_hook position
* Fix - Heading tag is not changing from h1 to other tag
* Fix - Impossible to set numeric field min value to zero
* Fix - Field titles in order view are not displayed on smaller screens
* Fix - Customer field values not display properly in the account area
* Tweak - Required field error is now displayed on product pages
* Tweak - Other minor bug fixes and improvements
* Dev - New filter wccf_field_value_to_store

* Feature - New field type: Decimal (field type Number is for whole numbers now)
* Fix - Cart item field editing view not loading when field has other field condition
* Fix - Field key input is not disabled when key can no longer be changed
* Fix - Issues related to other field conditions
* Fix - Issues with product attribute conditions
* Tweak - Performance improvements for product price display throughout shop
* Tweak - Shipping method conditions now support instances of shipping methods from zones
* Tweak - Other minor bug fixes and improvements
* Dev - New filter wccf_number_field_step
* Dev - New filter wccf_decimal_field_step