The test file at https://github.com/mozilla/pdf.js/blob/master/test/pdfs/annotation-choice-widget.pdf contains listboxes, which are not rendered correctly when printed right now. These kinds of fields are made by https://github.com/mozilla/pdf.js/blob/master/src/display/annotation_layer.js#L672-L678.

/cc @calixteman 
constructor(params) {
    super(params);
    const dict = params.dict;
    const data = this.data;
    this.ref = params.ref;
    data.annotationType = AnnotationType.WIDGET;
    if (data.fieldName === undefined) {
      data.fieldName = this._constructFieldName(dict);
    }
    if (data.actions === undefined) {
      data.actions = collectActions(
        params.xref,
        dict,
        AnnotationActionEventType