Added display of the number of products in the search filter.

Added display of the number of products in the search filter. It is possible to display the number of products taking into account the open category, as well as hide from the filter those values whose parameters are not in the products.

Added display of the number of products in the search filter.

Added "Payment returned" status, as well as automatic fixation when a payment is returned through the Fondy Payment System.
Added import of products from XML/YML via link.
Added payment system Fondy (with support for many languages, currencies, GooglePay and Applepay).