DOC-3355: Preview iframe missing content styles such as figure alignment#4090

kemister85 merged 2 commits intofeature/8.5.0/DOC-3355tinymce/tinymce-docs:feature/8.5.0/DOC-3355from

feature/8.5.0/DOC-3355_TINY-14194tinymce/tinymce-docs:feature/8.5.0/DOC-3355_TINY-14194Copy head branch name to clipboard