[Forminator Pro] Custom Sass Template for use with Vanilla Theme

When a form needs styling specifically to a client's Brand or Colours it would be very useful to have a Sass (or other css pre-processor) template available to use in conjunction with the vanilla theme option.

This would cover all configurations variations which could be easily integrated into an existing build process.

An additional feature would be to include an import or export option to upload output styles as custom themes available from the theme dropdown box. That way a theme could be used on multiple forms or a case by case basis as needed.