message: only warn if the project was modified
diff: @@ -49,10 +49,12 @@ modify(project);
  this.moveTest = this.moveTest.bind(this);
  this.resizeHandler = window.addEventListener("resize", this.handleResize.bind(this, window));
  this.quitHandler = window.addEventListener("beforeunload", (e) => {
  + if (project.modified) {
  const confirmationMessage = "You have some unsaved changes, are you sure you want to leave?";
  e.returnValue = confirmationMessage;
  return confirmationMessage;
  + }
  });
  }
  moveTest(testItem, destination) {
  