WebSocket messages max size 64KiB prevents sending e.g. images

[gsteinLTU]

We think this might be from actix, but it's causing issues doing things like sending an image from a PhoneIoT VM project. We tested and the browser used could send larger messages with no issue in other applications, the message is successfully sent. No message (WS or NetsBlox) is received on the recipient client.

[dragazo]

The working theory is that this comment in actix-web implies continuations are not supported, which would force every ws message to be a single frame. Meanwhile the Codec constructor has a default max frame size of 64KB.

Ideally we could switch to a different WS lib that actually works, but a minimal hack would be just increasing the max frame size.