Compatibility with Full Site Editor#162

There are various issues with using core framework on FSE/Gutenberg builds as CF tries to load CSS in the iframe incorrectly. This leads to various issues with other plugins such as Nick Diego’s block visiblity plugin and a range of react based errors.

Once Core Framwork is added to an FSE build the editor preview features become more or less unusable. It would be great to see some deep compaitility with WordPress for those who do not use 3rd party pagebuilders.