🐛(react) fix Field that can be compact and fullWidth

Being able to define the Field to be compact and fullWidth at the
same time was misleading. We need to be able to set the Switch
component fullWidth if needed, while by default it is compact. This
change makes possible the fullWidth props to override compact mode.

packages/react/src/components/Forms/Field/index.tsx

@@ -27,7 +27,7 @@ export const Field = ({
     <div
       className={classNames("c__field", "c__field--" + state, className, {
         "c__field--full-width": fullWidth,
-        "c__field--compact": compact,
+        "c__field--compact": compact && !fullWidth,
       })}
     >
       {children}