Quitting the game without seeing the summary page.

[mimo]

When quitting the game, we automatically switch to the summary page, but we should have a way to not see it. A typical use case is when saving a game to follow it later, we may not want to see the infos about the enemies. Adding a checkbox in the quit confirmation window, which would ask if we want to see the summary (true by default if the player is defeated or winner and false if the player is still in game) would do the job.