YITH WooCommerce Customize My Account Page 4.19.0

* New: Support to WooCommerce 3.4.4.
* New: Support to WordPress 4.9.8
* New: Compatibility with Polylang plugin.
* New: Add external url link to my account menu.
* New: Add icon on group item in menu.
* Update: Plugin Core.
* Update: Language files.

• New: Support to WooCommerce 3.4.1.
• New: Russian translation.
• Update: Spanish language.
• Update: Plugin Core.
• Fix: Function "yith_wcmap_endpoint_already_exists" return always true if value of item is zero.

* New: Support to WooCommerce 3.4 RC1.
* New: General Data Protection Regulation (GDPR) compliance.
* New: Polish translation (thanks to Igor Zborowski)
* Update: Language file.
* Update: Plugin core.
* Fix: Prevent incompatibility with page builder that encode [].