Add possibility to change configuration of the game before the next round

[Damgermys]

Can be nice to be able to:

• add or remove a question
• adapt the time by round
• add/remove remain rounds
• ...
  between 2 round without losing the points of the first rounds.

[AmauryCarrade]

Agreed. That could be not too hard to implement, actually. I'll look into that :)