V0.7.0 avatar and user to user name update

backend/src/routes/groups.js

@@ -92,6 +92,7 @@ router.get('/', authMiddleware, (req, res) => {
         const other = db.prepare('SELECT display_name, name, avatar FROM users WHERE id = ?').get(otherUserId);
         if (other) {
           g.peer_real_name = other.name;
+          g.peer_display_name = other.display_name || null; // null if no custom display name set
           g.peer_avatar = other.avatar || null;
           g.name = other.display_name || other.name;
         }