message: tweaked StructureSelectionCategorys
diff: @@ -188,7 +188,7 @@ const helix = StructureSelectionQuery('Helix', MS.struct.modifier.union([
  MS.core.type.bitflags([SecondaryStructureType.Flag.Helix])
  ])
  })
  -]), { category: StructureSelectionCategory.Residue })
  +]), { category: StructureSelectionCategory.Structure })
  const beta = StructureSelectionQuery('Beta Strand/Sheet', MS.struct.modifier.union([
  MS.struct.generator.atomGroups({
  @@ -204,7 +204,7 @@ const beta = StructureSelectionQuery('Beta Strand/Sheet', MS.struct.modifier.uni
  MS.core.type.bitflags([SecondaryStructureType.Flag.Beta])
  ])
  })
  -]), { category: StructureSelectionCategory.Residue })
  +]), { category: StructureSelectionCategory.Structure })
  const water = StructureSelectionQuery('Water', MS.struct.modifier.union([
  MS.struct.generator.atomGroups({
  