fix: GroupList field type JS control -> correctly load users and parse user IDs #259

feat: currentPrice field for product cache to consider actual price when sorting pcsg/kunden/froilein-adrett-template#79

fix: Declaration of QUI\ERP\Products\Product\Types\VariantParent::productSave() should be compatible with QUI\ERP\Products\Product\Model::productSave(,  = NULL)

refactor: Product->save() -> changed param from PermissionUser to EditUser