message: fix focus control breaks for non-atomic units
diff: @@ -58,6 +58,8 @@ function getFocusEntries(structure: Structure) {
  const l = StructureElement.Location.create(structure);
  for (const ug of structure.unitSymmetryGroups) {
  + if (!Unit.isAtomic(ug.units[0])) continue;
  +
  l.unit = ug.units[0];
  l.element = ug.elements[0];
  const isMultiChain = Unit.Traits.is(l.unit.traits, Unit.Trait.MultiChain);
  