Major redesign: The game can not be left without disconnecting from the server. This happens if a player is kicked, if he wishes to leave, or for other reasons. Error packets from the server will always cause a disconnect, however.

If joining a game fails, there is a proper failure packet now.

src/gui/qt/guiwrapper.h

@@ -99,6 +99,8 @@ public:
 	void SignalNetClientConnect(int actionID);
 	void SignalNetClientGameInfo(int actionID);
 	void SignalNetClientError(int errorID, int osErrorID);
+	void SignalNetClientNotification(int notificationId);
+	void SignalNetClientRemovedFromGame(int notificationId);
 	void SignalNetClientSelfJoined(unsigned playerId, const std::string &playerName, PlayerRights rights);
 	void SignalNetClientPlayerJoined(unsigned playerId, const std::string &playerName, PlayerRights rights);
 	void SignalNetClientPlayerChanged(unsigned playerId, const std::string &newPlayerName);