Added Quick Save/Quick Load and optimized system menu of Adventure mode
Using Quick Save/Quick Load by clicking menu item needs confirmation, but using F5/F8 doesn't.
Fixed bug of 0 XP monsters that has 8 or more levels difference with player
Note: When you encountered a bug, please zip and send your saves (the game folder\saves) to support@lowmagicage.com. It's extremely useful for debugging.