message: Fix observers not unsubscribing in flow component
diff: @@ -289,7 +289,7 @@ export class FlowComponent implements OnInit, OnDestroy {
  }
  ngOnDestroy() {
  - this.ngOnDestroy$.complete();
  + this.ngOnDestroy$.emitAndComplete();
  _.each(this._subscriptions, sub => {
  this._postService.unsubscribe(sub);
  }
  