WPMU DEV - Hummingbird 3.10

New: Option to delay below-the-fold Critical CSS until user interaction for better performance
New: Separate Mobile CSS generation when using Above-the-fold Critical CSS for improved mobile performance
Improved: Better page caching and preloading for mobile devices for improved response times
Improved: Better Critical CSS handling for themes which do not pass explicit IDs
Improved: Added Critical CSS, Delay JS and Font Swapping options on the Setup wizard
Fix: Asset Optimization Compatibility issues with Woo cart and checkout pages

Improvement: Improved WPML compatibility
Improvement: Improved Static Server Cache integration stability

- New: Viewport Meta Optimization for better mobile performance and responsiveness
- Improvement: Font Swapping for inline CSS font declarations
- Improvement: Caching compatibility with WooCommerce Multilingual & Multicurrency by WPML
- Fix: file_get_contents preventing Hummingbird from loading scripts in JavaScript Delay module
- Fix: PHP warnings generated by Performance test
- Improvement: Redis Object Caching integration deprecated
- Improvement: Legacy manual critical CSS deprecated (Replaced with automatic Critical CSS generation)
- Improvement: Minor fixes and improvements for Static Server Cache (FastCGI) integration