WP Super Forms - PayPal Add-on 1.1.0 Nulled

- Compatibility with latest Super Forms
- Improved: Update functionality
- Add-on now included in the `Super Forms - All In One Bundle` package

- Fix: When either price or quantity is empty or 0 we should skip adding the product, paypal doesn't accept this!

- Fix: With new super forms version make sure paypal sandbox is by default disabled, otherwise it thinks sandbox mode is enabled by default