Prompt for a new body part (Name / Shortcode), append it to the given zone,
and open the editor on it. Dismissing the dialog adds nothing; a blank name,
or a blank / duplicate shortcode, is refused with a warning. Part shortcodes
are unique body-wide, not merely within the zone.
Prompt for a new body part (Name / Shortcode), append it to the given zone, and open the editor on it. Dismissing the dialog adds nothing; a blank name, or a blank / duplicate shortcode, is refused with a warning. Part shortcodes are unique body-wide, not merely within the zone.