When refreshing one tab, the WS connection in another tab gets terminated

[FRosner]

Problem

The way we handle multiple web socket connections from one user it not optimal. E.g. when one connection gets terminated, we terminate all of them.

Solution

Instead we should generate a UUID for each connection and keep them in a

Map[String, (Account, Map[String, Concurrent.Channel[Msg]])]

instead of

Map[String, (Account, Set[Concurrent.Channel[Msg]])]

This way we can keep track of the WS connections depending on the session ID individually, allowing multiple connections per session independently.