`PlatformElevatedButton` not respecting `cupertino.color` when `originalStyle == false`

[martin-braun]

Right here:

flutter_platform_widgets/lib/src/platform_elevated_button.dart

Line 194 in 216d5e2

data: themeData.copyWith(primaryColor: color),

It passes color in. Instead, it should pass data?.color ?? color in, such as in

flutter_platform_widgets/lib/src/platform_elevated_button.dart

Line 174 in 216d5e2

color: data?.color ?? color,