[enhancement] Choose a background (for each conversation)

I’ve recently converted a friend to Jami, and something she lacks while coming from Messenger is being able to choose a background for each of her conversations.

added to epic &1 (closed)

added 1 deleted label

Moved to https://git.jami.net/savoirfairelinux/ring-project/-/wikis/technical/4.3.-Features-requests, Contribution welcomed!

closed

added typefeature request label