Both hold nothing, so adding one opens no editor: a dialog with no field on it is a step that exists
only to be got past. The picker itself answers the opposite way for the kinds that DO have a choice
to make, which is the distinction worth keeping.
The canvas draws no Edit button for them either — an Edit that opens nothing is worse than no Edit.
It asks the panel rather than holding a list of kinds, because which kinds are editable is the same
knowledge that decides which editor opens, and that already lives there. Absent means editable, so a
caller that has never thought about it gets what it had.
The Spacing dialog's label became a map. It was two kinds and readable as a ternary, then three and
not.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
pastilhasandClaude Opus 5
a4dfb3c81a