Make display name in group take you to contact card

[carsonfarmer]

From a user in public slack:

In the photos thread, i can't "tap" on a username to take me to their contact card - feature request!

Essentially, if you are viewing a photos from a given user in a given group, tapping on the username should take you to their contact card on the contacts screen, so you could invite them to other groups or chats.