message: mol-plugin: do not update focus theme if not set
diff: @@ -55,6 +55,8 @@ export namespace StructureRepresentationPresetProvider {
  }
  export function updateFocusRepr<T extends ColorTheme.BuiltIn>(plugin: PluginContext, structure: Structure, themeName: T | undefined, themeParams: ColorTheme.BuiltInParams<T> | undefined) {
  + if (!themeName && !themeParams) return;
  +
  return plugin.state.updateBehavior(StructureFocusRepresentation, p => {
  const c = createStructureColorThemeParams(plugin, structure, 'ball-and-stick', themeName, themeParams);
  p.surroundingsParams.colorTheme = c;
  