Previously these only appeared as plain, non-clickable <code> text in the hint
paragraph below the field-chip groups, styled almost identically to the real
chips (same tinted-pill background) - a user reported field references as
'not clickable, you have to type it out' after clicking that inert text
instead of the real chips above it. Added a proper 'Short names' chip group
so they're actually clickable, and changed the remaining plain hint-text code
snippets to a dotted underline instead of a pill background so they can't be
mistaken for buttons again.