Added the function of translating search filters and product characteristics.

Added the function of translating search filters and product characteristics. To simplify site management and speed up the process of import/export of goods, you can translate feature values by adding text values to them in other languages, without having to create an additional product type.

The "Wholesale prices" function has been updated.
Added [product_group_id] for Google Merchant, as well as a field for specifying the Type of variation.
A widget is added with a falling side menu.