高级自定义字段为Prestashop 1.9

NEW: support for Prestashop9
NEW: File custom field is now available for Products and Categories
NEW: Product custom fields are now available in the order invoice
NEW: For image fields it is possible to either display the image tag or the image url only
FIX: Minor bug fix for multi-shop

IMPROVEMENT: Added image custom fields for Products and Categories (Prestashop 1.7.7 and on)
IMPROVEMENT: Custom fields can now be positioned in specific order
FIX: Fixes for multi-shop functionality
FIX: Minor bug fixes