Fix various template warnings (#32)

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

data/magic-future-planeswalker-horizontal.mse-style/style

@@ -524,7 +524,7 @@ extra card field:
 	script: ":"
 	save value: false
 extra card style:
-	paintbrush
+	paintbrush:
 		left: 505
 		top : { 215 + card_style.illustrator.content_width * 0.5 }
 		width: 40