ISTWCMS-5416: adding form-required class to e/c groups instead of required...
requested to merge feature/ISTWCMS-5416-ebremner-require-exp-col-groups into feature/ISTWCMS-4866-ebremner-exp-col-block
ISTWCMS-5416: adding form-required class to e/c groups instead of required field and only allowing groups with values to be saved