File saves

[Apmannen]

• [x] Auto save when change room
• [x] Auto save if stay long in same room? Handled by scene manager or player maybe.
• [x] Load on start (temporary, before main menu)
• [x] Prevent setting value when default?
• [x] Quick save key, S or Q or something
• [x] Save play time
• [x] Auto save when getting item that haven't had before