Make repro for issue 218 visible

See: manfredsteyer/angular-oauth2-oidc#218

To reproduce:

1. Run `ng serve` for this commit
2. Open multiple (e.g. 4) Chrome windows with the demo app
3. Open the devtools Console on all of them
4. Keep the code open in VSCode
5. Log in on one window
6. Save any file to cause `ng` to reload all windows
7. Click "Clear Storage" button
8. Save any file to cause `ng` to reload all windows

Rinse and repeat step 7/8 until the issue arises, clearly visible in
the dev tools console.

Author: jeroenheijmans

src/app/auth.service.ts

@@ -47,16 +47,12 @@ export class AuthService {
     });
 
     window.addEventListener('storage', (event) => {
-      // The `key` is `null` if the event was caused by `.clear()`
-      if (event.key !== 'access_token' && event.key !== null) {
-        return;
-      }
-
-      console.warn('Noticed changes to access_token (most likely from another tab), updating isAuthenticated');
-      this.isAuthenticatedSubject$.next(this.oauthService.hasValidAccessToken());
-
-      if (!this.oauthService.hasValidAccessToken()) {
-        this.navigateToLoginPage();
+      if (event.key === 'nonce') {
+        console.log(
+          'old nonce',
+          (event.oldValue || '').substr(0, 15) + '...',
+          '// new nonce',
+          (event.newValue || '').substr(0, 15) + '...');
       }
     });