W3 Total Cache Pro 2.9.1

* Fix: Image Converter: Reset request when status is 404
* Fix: Image Converter: Better handling of separate format requests
* Fix: Image Converter: UI/JS changes
* Fix: Config caching/saving issue

* Fix: Elementor: Carousel lazy load
* Fix: Elementor: Cache clearing issues
* Fix: Strip all mfunc/mclude tags from REST, feeds, and comments
* Fix: Better validation for file directory cleanup
* Fix: Bunny CDN: Settings page purge URL section
* Fix: Minify: Auto JS: Handle async and defer attributes with values
* Fix: Google PageSpeed: Lighthouse changes
* Fix: Cloudflare: Undefined array warning
* Fix: Rackspace API: Reponse code handling
* Fix: License deactivation messages
* Update: ChartJS updated to v4.4.1
* Enhancement: Added support links

* Fix: Better logic for mfunc/mclude processing
* Enhancement: More consistent purge notices

* Fix: Sanitize mfunc/mclude content in REST calls
* Fix: Resolved plugin check errors
* Fix: Discard simplexml errors
* Fix: Missing text domains
* Fix: Ensure array type for filter "w3tc_footer_comment"
* Enhancement: WebP Converter: WP_Query optimizations