Bug Fixed: No. of questions that can be accepted

As a response to the bug submitted by mihaimaruseac, i have limited the numbers of questions that can be accepted by the admin. If another question is chosen by any other player, it can only be rejected in order not to accidentally skip one of them. I also added in the message box the name of the player who picked the question, so that the admin can accept the right question.

To get the number of questions picked, i have added each one in a stack, and as soon as it is processed(accepted or refused) it is poped it out. When a new question is picked, the length of the stack is evaluated and a proper message is displayed.