Type Alias FormPlacementDroppedClaim
FormPlacementDroppedClaim:
| { FieldNames: readonly string[]; Kind: "field" }
| { Kind: "section"; SectionKeys: readonly string[] }
| { Kind: "rail-tab"; RailKey: string }
| { Kind: "in-section"; SectionKey: string }
A proposal's claim the dialog does not offer because the form could not confirm it: the fields, sections or tab the panel was built to stand in for, or the section it was built to sit inside.