Demo to showcase autocomplete problems on firebase projects

Steps to reproduce:

1. Open Gitpod from master

2. Open src/app/tab3/tab3.page.ts

3. Add line private test2: ReplaySubject<boolean> = new ReplaySubject(); to class and autocomplete ReplaySubject.

   => This will automatically add the import for ReplaySubject.

4. Add this to constructor and try to autocomplete the map operator from rxjs/operators.

       this.test.pipe(
         map
       )
   

   => The autocompletion is not available.