Chat Systems 3.4.1

Upgrading from 3.4.0

• Pull both images and restart api, worker and frontend; there is no migration.

Fixed

• Custom emoji show. Their image answered 404, because the download route only knew
  uploaded files, so a custom emoji was a broken image everywhere: in Custom emoji, in
  messages and in reactions. Anyone in the workspace can now load it, and a new one is stored
  under its image type, so local storage serves it as an image.
• Typing :name offers the workspace's own emoji, first, above the standard ones;
  choosing one inserts :name:.