Fix various template warnings (#32)

- Missing :
- Deprecated =
- Not valid color name
- Must always return statement

data/magic-future.mse-style/style

@@ -530,7 +530,7 @@ extra card style:
 		visible: { card.pt != "" }
 		render style: image
 		image: { card_ptbox() }
-	paintbrush
+	paintbrush:
 		right: { ( if card.pt != "" then 275 else 338 ) - card_style.illustrator.content_width }
 		top : 476
 		width: 40