Image Upload in the Messenger

Besides module images I never wanted to host user uploaded images on the server because of the potential trouble with backups and malware.
But users pointed out that in case of the marketplace it is very helpful to send images via the messenger to not disclose their private data/ email adresses early. So that is possible now. You can send one image per message.
The images are hosted on a Google Cloud Server. Because that service charges money for hosting and traffic the new feature is an Unicorn Only feature.
Since I have no idea how expensive it is in the long run the image upload is an experimental feature, so save any important images localy, because the data might vanish again.