* 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()