message: fix traceOnly handling in makeElementIgnoreTest
diff: @@ -46,7 +46,7 @@ export function makeElementIgnoreTest(structure: Structure, unit: Unit, props: E
  const childUnit = child?.unitMap.get(unit.id);
  if (child && !childUnit) throw new Error('expected childUnit to exist if child exists');
  - if (!child && ((!ignoreHydrogens && !traceOnly) || traceOnly)) return;
  + if (!child && !ignoreHydrogens && !traceOnly) return;
  return (element: ElementIndex) => {
  return (
  