restoreHtmlFromCache() {
    const htmlCache = this.getStore("htmlCache");
    if (htmlCache) {
      const targetNode = document.getElementsByTagName("html")[0];
      targetNode.innerHTML = htmlCache;
      log("trace", "uibuilder.module.js:restoreHtmlFromCache", "Restored HTML from cache")();
    } else {
      log("trace", "uibuilder.module.js:restoreHtmlFromCache", "No cache to restore")();
    }
  }
Restore the complete DOM (the whole web page) from browser localStorage if available