Change how the user avatar is exchanged between client und server

app/static/js/ResourceLists/UserList.js

@@ -72,7 +72,7 @@ class UserList extends ResourceList {
     return {
       'id': user.id,
       'member-since': user.member_since,
-      'avatar': user.avatar ? `/users/${user.id}/avatar` : '/static/images/user_avatar.png',
+      'avatar': user.avatar,
       'username': user.username,
       'full-name': user.full_name ? user.full_name : '',
       'location': user.location ? user.location : '',