message: camera helper param tweaks
diff: @@ -27,10 +27,11 @@ import { RuntimeContext } from '../../mol-task';
  const AxesParams = {
  ...Mesh.Params,
  - colorX: PD.Color(ColorNames.red),
  - colorY: PD.Color(ColorNames.green),
  - colorZ: PD.Color(ColorNames.blue),
  - scale: PD.Numeric(1, { min: 0.1, max: 2, step: 0.1 }),
  + ignoreLight: { ...Mesh.Params.ignoreLight, defaultValue: true },
  + colorX: PD.Color(ColorNames.red, { isEssential: true }),
  + colorY: PD.Color(ColorNames.green, { isEssential: true }),
  + colorZ: PD.Color(ColorNames.blue, { isEssential: true }),
  + scale: PD.Numeric(0.5, { min: 0.1, max: 2, step: 0.1 }, { isEssential: true }),
  }
  type AxesParams = typeof AxesParams
  type AxesProps = PD.Values<AxesParams>
  