Page builder content is not searchable

When using the front end or back end search, the content in pages that use ZB will not be found. For example, I added the default “Steps” template to a page. A search for “design brief” returns 0 results. The generated html (or at least the text) of page-builder content needs to be copied into post_content for the build-in search to work as expected. This will also improve your compatibility with SEO plugins, and improve the user experience on the edit post page by replacing the old, pre-ZB content.