W3 Total Cache Pro 2.8.0

* Feature: Added dismissible notifications
* Fix: PHP error in Page Cache when deleting media
* Fix: PHP warning in Page Cache when modifying an attachment
* Update: Added additional default query strings for page cache exemptions
* Update: Removed obsolete Google PageSpeed metrics
* Update: Condensed Google PageSpeed proof block format for certain settings/features
* Update: Added missing Google PageSpeed score block for PageCache Lazy Loading Google Maps setting on General Settings page

* Fix: WP-CLI get option output for array type
* Fix: Remove CSS/JS URL matching
* Fix: Nginx rules for feature and permission policies
* Fix: Redis connect port for unix sockets error
* Update: Newsletter in footer is now a link to a working form
* Update: Added JSON type for WP-CLI get/set option
* Update: Added config export for WP-CLI
* Update: Added content matching option for Remove CSS/JS individual entries
* Update: Updated Google PageSpeed score block appearance for cleaner UI
* Update: Added Google PageSpeed score block for PageCache Lazy Loading Google Maps setting
* Update: Added Google PageSpeed score block for Minify Eliminate Render Blocking CSS option

* Fix: Page Cache cleanup purging all if browsercache.html.lifetime > W3TC_CACHE_FILE_EXPIRE_MAX
* Fix: Page Cache primer: Ignore sitemap XML comments
* Fix: Page Cache primer: Preload cache for custom post types
* Fix: Page Cache primer: Add an option to prime cache after updating a post/page/CPT
* Fix: Redis test logic
* Fix: Cloudflare extension: Setting values via API
* Fix: Amazon SNS message validation
* Fix: Handle XML setting being saved properly
* Update: Add more options to the Remove CSS/JS feature
* Update: Add an option for Amazon CloudFront default region in distribution hostname
* Update: Add information about feature impact on PageSpeed
* Update: Reworked the Page Cache Preload settings UI