When a user sends a link thanks to the livechat, the link is not
clickable is the recipient is on the frontend (e.g. visitor of the
website). On the other hand, a link sent from the frontend to the
backend works.
This is because the message is sent as "html" from the backend,
therefore no link conversion is done during the post-process of the
massege (method `message_post`).
Note that a link sent and received in the backend works because
additional formatting is done (convert emojis, add links...).
opw-686063
Nicolas Martinelli
f30ec3022e