Reformat everything to standard

Standard:

- Use {} for blocks of GUI.Begin/End methods for explicit indentation
purposes
- Use explicit private
- Explicitly state serializable/nonserialized intent on fields in
serializable types
- Reorder methods/members by
- public enums
- public delegates
- const
- static fields
- instance fields
- constructors
- public static methods
- public instance methods
- public interface implementations
- private static methods
- private instance methods
- private interface implementations
- properties and indexers
- nested types