Settings stored in a mod pack that no setting prototype in the export
data defines are now listed in a collapsed "Unknown settings" panel
under each scope instead of under an "Unknown Fields" heading. Each one
has a remove link, and a revert link once removed, matching what
`clusterioctl mod-pack edit --remove-setting` already allows. They are
never removed automatically.
Without export data nothing is called unknown and stored settings are
listed as before, without a mod heading.
Fixes#773
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
