Title Screen QOL Theming

This was supposed to be a quick quality of life addition for the Title Screen that applied the save and theme to the menu, but then I discovered a new bug I had to bypass with the character palette when doing it. So I ended up doing a bit more related to the Title Screen as a result.

I also *had* a function which checks for the number of valid folders within the Pck to see how many worlds there are, but I think it might've been a bit slow so I replaced it with constant values.

- Save for the currently loaded campaign gets applied on startup
- Backing out of World 9 and over keeps you on said worlds at the title screen
- Added Skyland and Volcano to SMB1 themes since it shares most of its themes with Lost Levels
- Fixed Title Screen Stars for the Volcano Theme

Assets/Sprites/UI/TitleScreenStars.json

@@ -92,6 +92,6 @@
 		"Castle": {"source": "TitleScreenStars.png", "rect": [0, 16, 24, 8]},
 		"Snow": {"source": "TitleScreenStars.png", "rect": [0, 24, 24, 8]},
 		"Space": {"source": "TitleScreenStars.png", "rect": [0, 32, 24, 8]},
-		"Volcano": {"source": "TitleScreenStars.png", "rect": [0, 48, 24, 8]}
+		"Volcano": {"source": "TitleScreenStars.png", "rect": [0, 40, 24, 8]}
 	}
 }