Alternate state field as a dropdown

add_alt_state_dropdown.js

state: {
  ref: "qHyperCubeDef.qStateName",
  label: "State",
  type: "string",
  defaultValue: "$",
  component: "dropdown",
  options: function () {
    return qlik.currApp(this).getAppLayout().then(function (a) {
      return a.layout.qStateNames.concat('$').map(function (state) {
        return {
          value: state,
          label: state
        };
      });
    });
  }
}