Client should tell the server when the player leaves closes his game that he is not in that game anymore

[BlackYps]

The client determines if a player is in a game by looking at the list of ongoing games from the server. Currently the server has no way to know if a defeated player has closed his fa instance. The client should send a message to the server when his fa instance closes that he is not in game anymore.

We need this for tmm so it doesn't restrict players that exited early from queueing up again.
Related server issue: FAForever/server#703

[BlackYps]

The client already sends a message:

downlords-faf-client/src/main/java/com/faforever/client/remote/FafService.java

Line 140 in 3418820

public void notifyGameEnded() {