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

Extract org swapping into own resource

Refactor how section ordering is handled (#1837) ...

* Extract template customizations into own controller

* Refactor Template model methods

* Fix view logic in draggable sections

* Add button for customising phase

* Fix rubocop violations in GuidanceService

* Rename GuidanceService to GuidancePresenter

* Fix bug in phase preview order sections

* Refactor preview action/controller code

* Fix Section ordering in various views

* Fix rubocop violations

* Fix bug forcing Phases to be modifiable

* Fix broken tests

* Update method to check if section is draggable

* Extract copy action into its own resource

* Extract customization transfers to own controller

* Remove redundant routing condition

* Fix Rubocop violation issues

* Change condition for section draggable

* Refactor instance variable in PlansController

* Fix broken tests

* Add test support for 'de' locale

* Fix merge issue in plans controller

* Fix broken specs in plan#request_feedback