Added the ability to compare dishes from regular and kitchen orders

In V7Preview4, for dishes and modifiers in a kitchen order, links to the corresponding dishes and modifiers in the original order have been added.

• IKitchenOrderCookingItem.BaseOrderItemId — corresponds IOrderCookingItem.Id,
• IKitchenOrderModifierItem.BaseOrderModifierId — corresponds IOrderModifierItem.Id,
• IKitchenOrder.BaseOrderId — corresponds IOrder.Id.