message: tweaked StructureRepresentationInteraction visual
  make look less like ball+stick default
diff: @@ -47,16 +47,16 @@ export class StructureRepresentationInteractionBehavior extends PluginBehavior.W
  private createResVisualParams(s: Structure) {
  return StructureRepresentation3DHelpers.createParams(this.plugin, s, {
  - repr: BuiltInStructureRepresentations['ball-and-stick'],
  - size: BuiltInSizeThemes.physical
  + repr: [BuiltInStructureRepresentations['ball-and-stick'], () => ({ sizeAspectRatio: 1 })],
  + size: [BuiltInSizeThemes.uniform, () => ({ value: 0.6 } )]
  });
  }
  private createSurVisualParams(s: Structure) {
  return StructureRepresentation3DHelpers.createParams(this.plugin, s, {
  - repr: BuiltInStructureRepresentations['ball-and-stick'],
  + repr: [BuiltInStructureRepresentations['ball-and-stick'], () => ({ sizeAspectRatio: 1 })],
  color: [BuiltInColorThemes['element-symbol'], () => ({ saturation: -3, lightness: 0.6 })],
  - size: [BuiltInSizeThemes.uniform, () => ({ value: 0.66 } )]
  + size: [BuiltInSizeThemes.uniform, () => ({ value: 0.3 } )]
  });
  }
  