* i18n: simpler translation strings
* i18n: simpler translation strings
* i18n: readble printf(), and moving the %s placeholder to `%s product`
* i18n: make string translatable and remove the HTML tags
* i18n: avoide using HTML tags in translatino strings
* i18n: move the colon into the translation string and use %s placeholder for the IP
* i18n: use sprintf() on field-validation translation strings, and unify those strings
* i18n: move colons into the translation strings
* i18n: use `%s` placeholder as the site name in "Powered by WooCommerce" string
* i18n: use `%s` placeholder for min and max price
* i18n: rewrite the translation strings printf()
* Fix test error
* i18n: simpler translation strings
* i18n: simpler translation strings
* i18n: readble printf(), and moving the %s placeholder to `%s product`
* i18n: make string translatable and remove the HTML tags
* i18n: avoide using HTML tags in translatino strings
* i18n: move the colon into the translation string and use %s placeholder for the IP
* i18n: use sprintf() on field-validation translation strings, and unify those strings
* i18n: move colons into the translation strings
* i18n: use `%s` placeholder as the site name in "Powered by WooCommerce" string
* i18n: use `%s` placeholder for min and max price
* i18n: rewrite the translation strings printf()
* Replace some context function with translation comments
* Remove two more context function
* Replace another context function with translation comments
* Fixed case for all _e, esc_attr_e and esc_html_e strings
* Fixed case for all _n_noop strings
* Fixed case for all _x strings
* Fixed case for all __, esc_html__ and esc_attr__ strings
* Fixed a few more strings
* Fixed strings in unit tests
* Fix PayPal Standard case.
* Save Order text
* Implement some missing legacy functions
* Stop calling legacy functions from some pages
* Prevent extra meta from being deleted, unless requested by the CRUD (was causing problems with user/customer)
* Prevent save when loading from session AND logged out
Instead of json_encode(), because json_encode() takes types into
account, meaning numbers may end up being represented in the
encoded JSON as a string, e.g. "1" instead of 1, which can lead
to the md5() being different between requests.
This issue surfaces when creating a cart hash in a different
request to the request to pay for the order, because after adding
line items to the cart, the items quantity will be encoded with
json_encode() as an int, but when encoding them in a different
request, where they are coming from the database, they will be
encoded as a string.