fix: structured content renders correct on hover and select#1843

harbournick merged 13 commits intomainsuperdoc-dev/superdoc:mainfrom

colep/sd-1584-improve-sdt-selection-and-highlighting-to-match-wordsuperdoc-dev/superdoc:colep/sd-1584-improve-sdt-selection-and-highlighting-to-match-wordCopy head branch name to clipboard