Idle Client Timeout Functionality

Added the functionality client side to log users out of servers if they
are idle for more than 1 hour without joining either a game or room.
Sending a message (room/game/private) or performing a game action.

cockatrice/src/tab_message.h

@@ -26,6 +26,7 @@ private:
 signals:
     void talkClosing(TabMessage *tab);
     void maximizeClient();
+    void notIdle();
 private slots:
     void sendMessage();
     void actLeave();