message: fix assembly symmetry cage orientation calc
diff: @@ -245,7 +245,7 @@ function setSymbolTransform(t: Mat4, symbol: string, axes: AssemblySymmetry.Rota
  pair = [a5]
  for (const a of axes.filter(a => a.order === 3)) {
  let d = radToDeg(Vec3.angle(Vec3.sub(up, a.end, a.start), a5dir))
  - if (equalEps(d, 100.81, 0.1)) {
  + if (equalEps(d, 100.81, 0.1) || equalEps(d, 79.19, 0.1)) {
  pair[1] = a
  break
  }
  @@ -261,6 +261,8 @@ function setSymbolTransform(t: Mat4, symbol: string, axes: AssemblySymmetry.Rota
  Vec3.copy(target, aA.end)
  if (aB) {
  Vec3.sub(up, aB.end, aB.start)
  + const d = Vec3.dot(eye, up)
  + if (d < 0) Vec3.negate(up, up)
  Mat4.targetTo(t, eye, target, up)
  Mat4.scaleUniformly(t, t, size * getSymbolScale(symbol))
  } else {
  