True when sectionKey sits in the left-nav Details group — the one rail
item that shows SEVERAL panels at once (every field panel, plus any
contribution registered with ChromeGroup: 'details'). The container
renders those panels as ONE card (.mj-chrome-details, with
-first / -last on the visual edges): no per-section headers, one
surface — otherwise the field rows float on the page background.
True when
sectionKeysits in the left-nav Details group — the one rail item that shows SEVERAL panels at once (every field panel, plus any contribution registered withChromeGroup: 'details'). The container renders those panels as ONE card (.mj-chrome-details, with-first/-laston the visual edges): no per-section headers, one surface — otherwise the field rows float on the page background.