CHATA now doesn't send chatmsg to sender gui

src/main/java/ch/unibas/dmi/dbis/cs108/multiplayer/server/ClientHandler.java

@@ -216,6 +216,9 @@ public class ClientHandler implements Runnable {
    */
   public void broadcastChatMessageToAll(String msg) {
     for (ClientHandler client : connectedClients) {
+      if(client.getClientUserName().equals(this.getClientUserName())){
+        continue;
+      }
       client.sendMsgToClient(Protocol.printToClientChat + "$" + clientUserName + ": " + msg);
     }
   }