Update StageStyle.UTILITY:
Clarified that UTILITY stages may impose platform-specific restrictions on window states, such as preventing maximize, minimize (iconify), and fullscreen operations.

Update StageStyle.UNDECORATED:
Improved the description to clarify that although UNDECORATED removes standard window decorations (title bar, borders, and controls), window operations like minimize, maximize, and fullscreen may still be allowed programmatically or via platform-specific functions such as key shortcuts or menu options.

Remove mention of solid white background:
This seems to be not true anymore, even withou a Scene (or there's a bug)