Updated format for sending data when ordering and changing order status.

Updated format for sending data when ordering and changing order status. The POST request will be sent in JSON format.

Updated format for sending data when ordering and changing order status.

A new method for displaying the list of categories in the Store has been added.
Added the ability to update when importing the "quantity of goods in stock" by a mathematical expression.
Added the function of translating search filters and product characteristics.