Webp fixes for Divi and Jetpack

This release includes a compatibility fix for the Divi Builder when using Alt WebP Rewriting. It also includes an enhancement to work with Jetpack's Carousel gallery display.
The ability to hard crop images during resizing was added via the ewww_image_optimizer_crop_image filter, the plugin status section was revamped to rely less on JS and give better guidance to the user as to what things are actually problems. Lastly, a regression with the scheduled optimizer was fix, where the set_time_limit function was no longer increasing the timeout to ensure successful operation.