Fix (Dynamic Content): prevent blurry images when using image optimizer

[mxkae]

fixes #3296

[github-actions]

🤖 Pull request artifacts

file	commit
pr3369-stackable-3369-merge.zip	2f99f7a

[github-actions]

Try this Pull Request in the WordPress playground: https://playground.wordpress.net/?mode=seamless#{"landingPage":"/wp-admin/post-new.php?post_type=page","preferredVersions":{"php":"latest","wp":"latest"},"steps":[{"step":"login","username":"admin","password":"password"},{"step":"installPlugin","pluginZipFile":{"resource":"url","url":"https://raw.githubusercontent.com/gambitph/Stackable/artifacts/pr3369-stackable-3369-merge.zip"}}]}

[bfintal]

Let's add some documentation to help us in the future.

Also, let's only load the file only when the EWWWW plugin is activated