WP Smush Pro 3.16.8

- Fix: Loopback error shown unnecessarily for some sites
- Improvement: Better UI for the loopback error

- Improvement: Better handling of rotated images
- Improvement: Better pre-flight checks before bulk Smush is started
- Fix: Performance issues in CDN and webp link replacement functionality
- Fix: Bulk Smush performance issues
- Fix: Compatibility issue with wp.com

- Fix: LazyLoad module not working correctly for picture elements in certain situations
- Fix: LazyLoad module not working correctly for some CSS variables
- Fix: Better handling of !important CSS rules by the LazyLoad module
- Fix: Performance issues on some WooCommerce pages