reloadIframe function
Reloads an IFrame document.
Implementation
Future<bool> reloadIframe(HTMLIFrameElement iFrame, [bool? forceGet]) async {
  var loaded = await addJavaScriptCode('''
    window.__dom_tools_reloadIFrame = function(iframe,forceGet) {
      iframe.contentWindow.location.reload(forceGet);
    }
  ''');
  if (!loaded) return false;
  forceGet ??= false;
  callJSFunction('__dom_tools_reloadIFrame', [iFrame, forceGet]);
  return true;
}