Make it easier to export Effects Rack presets

[Gpag]

The ability to export application settings is useful, and covers this feature in a much broader stroke, but it would be immensely useful to be able to export just the effects rack presets, or even better specific presets of the user's choosing. When moving from one computer to the next, it may be specifically helpful to be able to bring over effects presets while not overwriting the whole application settings.