Only one player can request a question to be picked

[mihai-varga]

• restored the game's original idea, that only the player who answered correctly can choose the next question, or if the one how buzzed answers false, a random player is chosen to be the one who picks next.
• fixed some excessively long comment lines
• i have set the player's name in the message box in bold, so that the admin can more easily identify the player.

[mihai-varga]

creates a list of available players, so when it generates the random number, i doesn't need to check again if the player is available

[dfilimon]

Thank you! 👍