Attach (recommended) or Link to PDF file here:
https://drive.google.com/open?id=1UjLxnFw2g3gn3tvNLRYLdmG6mFdFKCcr

Configuration:
- Web browser and its version: Chrome 77.0.3865.90
- Operating system and its version: Mac mojave 10.14.6
- PDF.js version: 2.3.194
- Is a browser extension: Nope

Steps to reproduce the problem:
1. Make sure to set `renderInteractiveForms` to `true`
2. The read-only form field(Sample title) doesn't honor it's proper font-size

What is the expected behavior?
<img width="862" alt="write" src="https://user-images.githubusercontent.com/4616548/66152094-4a009a80-e64b-11e9-81dc-178068055efa.png">

What went wrong?
<img width="842" alt="wrong" src="https://user-images.githubusercontent.com/4616548/66152100-4d942180-e64b-11e9-91a8-ad9caf451f98.png">


super(parameters, { isRenderable: true });
    const { filename, content } = this.data.file;
    this.filename = getFilenameFromUrl(filename);
    this.content = content;
    this.linkService.eventBus?.dispatch("fileattachmentannotation", {
      source: this,
      id: stringToPDFString(filename),
      filename,
      content,
    });
  }
  render() {
    this.container.className = "fileAttachmentAnnotation";
    const trigger = document.createElement("div");
    trigger.style.height = this.container.style.height;
    trigger.style.width = this.container.style.width;
    trigger.addEventListener("dblclick", this._download.bind(this));
    if (!this.data.hasPopup && (this.data.title || this.data.contents)) {
      this._createPopup(trigger, this.data);
    }
    this.container.appendChild(trigger);
    return this.container;
  }
  /**
   * Download the file attachment associated with this annotation.
   *
   * @private
   * @memberof FileAttachmentAnnotationElement
   */
  _download() {