message: Fixed - SignaturePad question is missing in toolbox
diff: @@ -2,6 +2,7 @@ import { Serializer } from "./jsonobject";
  import { Question } from "./question";
  import { surveyLocalization } from "./surveyStrings";
  import SignaturePad from "signature_pad";
  +import { QuestionFactory } from "./questionfactory";
  var defaultWidth = 300;
  var defaultHeight = 200;
  @@ -182,3 +183,6 @@ Serializer.addClass(
  },
  "question"
  );
  +QuestionFactory.Instance.registerQuestion("signaturepad", (name) => {
  + return new QuestionSignaturePadModel(name);
  +});
  