Added sorting information fields in the admin center.

Added sorting information fields in the admin center. Sales statistics, products, categories, articles, etc. The field is displayed if a search is performed by any of the available parameters.

Added sorting information fields in the admin center.

Added the ability to create a pop-up list with store categories in the main menu.
Updated sorting of fields when importing / exporting price.
Added the ability to set a limit for entries in child subcategories.