message: use sequential list as default for model-index color theme
diff: /**
  - * Copyright (c) 2019 mol* contributors, licensed under MIT, See LICENSE file for more info.
  + * Copyright (c) 2019-2020 mol* contributors, licensed under MIT, See LICENSE file for more info.
  *
  * @author Alexander Rose <alexander.rose@weirdbyte.de>
  */
  @@ -17,7 +17,7 @@ const DefaultColor = Color(0xCCCCCC)
  const Description = 'Gives every model a unique color based on the position (index) of the model in the list of models in the structure.'
  export const ModelIndexColorThemeParams = {
  - ...getPaletteParams({ type: 'scale', scaleList: 'red-yellow-blue' }),
  + ...getPaletteParams({ type: 'scale', scaleList: 'purples' }),
  }
  export type ModelIndexColorThemeParams = typeof ModelIndexColorThemeParams
  export function getModelIndexColorThemeParams(ctx: ThemeDataContext) {
  