Websocket connection does not work reliably

[ChristophNiehoff]

In a game with 8 players the websocket connection did not work reliably. In particular, when adding threats the state was not updated for all players. The "Add threat"-modal did not disappear and the users were stuck. Reloading the page helped.

Workaround: The player adding the threat has to click "Save" before clicking "Save & Add".