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 
expect(data.annotationType).toEqual(AnnotationType.WIDGET
      expect(data.textAlignment).toEqual(1
      expect(data.maxLen).toEqual(20
      expect(data.readOnly).toEqual(true
      expect(data.hidden).toEqual(false
      expect(data.multiLine).toEqual(true
    }
    it("should reject comb fields without a maximum length", async function () {
      textWidgetDict.set("Ff", AnnotationFieldFlag.COMB
      const textWidgetRef = Ref.get(46, 0
      const xref = new XRefMock([{ ref: textWidgetRef, data: textWidgetDict }]
      const { data } = await AnnotationFactory.create(
        xref,
        textWidgetRef,
        pdfManagerMock,
        idFactoryMock
      
      expect(data.annotationType).toEqual(AnnotationType.WIDGET
      expect(data.comb).toEqual(false
    }
    it("should accept comb fields with a maximum length", async function () {
      textWidgetDict.set("MaxLen", 20
      textWidgetDict.set("Ff", AnnotationFieldFlag.COMB
      const textWidgetRef = Ref.get(46, 0
      const xref = new XRefMock([{ ref: textWidgetRef, data: textWidgetDict }]
      const { data } = await AnnotationFactory.create(
        xref,
        textWidgetRef,
        pdfManagerMock,