That section doesn't appear to exist for me. The "Miscellaneous" section has the subtitle "Wells, badges, and close icon", but only wells and the close icon are actually there.

Edit: Whatever cache was holding this appears to have refreshed, I can now see it under its separate section, along with the rest of the updated docs.

Nice! Right after I read the blog post, I looked at the docs and they weren't updated. I should have just been patient and waited for everything to update.