Add confirmation for exit game

mobidyc

Hello,

something very annoying (for me).
On Android, when I click on the "back" button, if I am on the main page it exits the game.

Of course I usually do not want to quit the game, the click on this damn "back" button is not done on purpose.

Just adding a confirmation popup to detect if we really want to quit the game or no would be really great.

Cheers