[FA]{refactoring} unnecessary Playscreen fields

Removed unnecessary Playscreen fields
[FA]{refactoring} refactoring

-Removed clamp method from MathSneakQuest and use libgdx's clamp instead
-Added Volume Enum
-Added StartRotation Enum
-Added start rotation setting in map config file
-Attempting setting Map selection ScrollPane scrollbar position based on
the selected item (failed)