don't use store.dispatch to start notifications / change initAction$

[fxck]

It should instead use onInit$ subject instead, which means changing https://github.com/fxck/ngrx-example/blob/master/src/app/app.component.ts#L55 to checkAuthAction$ and add startNotificationsAction$.

@MikeRyan52 is there a better way(than to create subject and next() it in ngOnInit) to dispatch multiple actions actions on component init?