Perfmatters 2.3.6

* Made adjustment to the CSS Background Image styles to work with some changes in the latest version of our lazy loading library.
* Fixed an issue that was preventing quotations from being stripped from background image URLs when prepping an inline background image for lazy loading.
* Fixed an issue where delayed CSS was not loading properly when using individual JS delay.
* Fixed an error that was being logged in some cases when checking for an active plugin in the JS class.

* Added additional logic to Delay JS script to make sure the initial interaction is processed.
* Added additional styles to CSS Background Image feature to work with background images set on ::before selectors.
* Added additional logic on custom login URL admin_url filter to fix certain scenarios where login URL was not being replaced correctly.
* Added additional default tags to various dropdowns in plugin settings for better clarification.
* Added default arrays for stylesheet and selector exclusions that are always needed.
* Adjusted perfmatters_cdn filter location for compatibility.
* Made some adjustments to CDN Rewrite Regex to fix some issues where unwanted strings were getting picked up as URLs in some cases.
* Translation updates.

* Updated EDD plugin updater class to version 1.9.2.
* Added default exclusion to REST API option for compatibility.