new notification style, poster expansion border, changing media screen to media all...

notification style
https://meta.discourse.org/t/unread-new-badge-style/17945

border
https://meta.discourse.org/t/user-card-needs-a-border/17990

media all
https://meta.discourse.org/t/do-we-need-to-have-media-screen/17955

:sparkles: