added hidden field to plan_export_form, updated controller auth logic to allow public plan owners to choose options

Remove old JS form validations (#1867) ...

* added new form validation error handling

added tests for orgs controller

converted over remaining controllers to new errors

enhanced message handlers in application controller

finished form validations

* fixed rubocop for all controllers

* Fix broken specs

- Factories needed to be updated to meet new validation requirements
- Spec was broken since error message had changed

* Fix errors and warnings from npm audit

Fix bug preventing PDF downloads from dashboard

Fix bug preventing plans from downloading

Refactor plan exports. Extract into own resource