Added a group change "Prices" - "Markup", based on the "Purchase price".

Added a group change "Prices" - "Markup", based on the "Purchase price". The function takes into account the "Markup" only for those product cards for which the "Purchase price" is specified.

Added the ability to receive payments using acquiring from Monobank.
Updated image compression module. Compression for JPEG images improved by 3 times.
Added "Quick" import of store categories.