message: Fix bug concerning url param removal
diff: +import { PARAMETERS } from './common';
  +
  export function clearUrlParameters() {
  window.history.pushState({}, document.title, BASE_URL + 'generator');
  + for (let param in PARAMETERS) if (Object.prototype.hasOwnProperty.call(PARAMETERS, param)) delete PARAMETERS[param];
  }
  // Returns `true` if canvas image extraction is blocked.
  