What do green/gray check mark icons mean in Facebook App Dashboard?

Question

In Facebook App Dashboard ( https://developers.facebook.com/apps/##########/ ) under Products I see 'Facebook Login' and 'Analytics' and green or gray check mark icons next to them. What do these icons mean?

[Edit] The App is live. Login Permissions in App Review are approved by default (email, public_profile, user_friends). But one of my app has gray icon for Facebook Login and another app has green icon for Facebook Login. I can't find a pattern.

Answer 1

I also wondered about this until I noticed FB's App Center support page states:

"If your game is approved it may take up to 4 weeks and a minimum amount of players to be searchable in App Center."

https://developers.facebook.com/docs/games/listing/