Email Stats: Consistent ordering in different screens

[staskus]

On the web, Stats Subscribers emails were sorted by post_id on the card, and by popularity on the details page. We replicated this functionality. However, this wasn't done intentionally and the change was made on the web to make the sorting consistent:

Automattic/wp-calypso#90324

Expected behavior

Sort Stats Subscribers emails by post_id both on the card and on the details page.

[dangermattic]

Thanks for reporting! 👍