Customize Button (and other components) label color when active

[davide-granello]

It is currently possible to customize the background color of an active button component, but not the label text color:

ThemeManager.setComponentTheme('Button', (props, context) => {

  return {
    // This will apply a background color when the Button is active (pressed)
    activeBackgroundColor: 'red',
    // It should be possible to define also the label text color when Button is active (pressed)
    activeLabelTextColor: 'blue'
  };
});

This should be applied on all pressable components, like Button, Chip, etc