XF 2.1 How can I get my (or a) logo to display with the Push Notifications alert.. I've seen it on XF and other boards with the site logo/image...

[Chernabog]

I don't know if I am doing something wrong or not. On my one installation the logo does appear in the push notifications but on another one it does not. Is there a special way to get it to show the site logo or image? I try to validate one against the other to see if I missed something in settings, but it doesn't appear so.

Any other users have an idea? Thanks all!