[Idea] Add normal settings

[zabidenhtf]

Now you can on H key toggle arrows. But im think will be better add checkbox. Also idea add controls settings (because some guys like play on arrows, and some on W A S D)

[petitlapin]

I'm not sure I fully understand the idea.
H allows to display or hide the next direction the train is supposed to go. I don't understand where we would add a checkbox. Directly in the menu on the right during the game?

We need to be careful doing WASD, because of keyboard layouts (a French keyboard would be ZQSD).