Tutorial fixes and implementation of autosave to save16 and other updates
Note that save 16 is automatically overwritten during sleep.
・When a field is released, an image guidance is added.
・Adjusted line break cursor design for text.
・Fade-in and fade-out expressions have been adjusted.
・A confirmation dialog box is now displayed when the Close button is pressed.
・Auto-save to save 16 function implemented.
・Improved winter graphics