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

shared search view passing controller and action. DMPRoadmap/roadmap#1027 ...

new methods for paginable in order to abstract the sorting mechanism. DMPRoadmap/roadmap#1027

paginable concern refining scope query and helpers for sorting. DMPRoadmap/roadmap#1027

refactored paginable controllers and views after updating paginable concern. DMPRoadmap/roadmap#1027

Added comments to paginable concern methods. DMPRoadmap/roadmap#1027

user and theme using generic search from paginable. DMPRoadmap/roadmap#815 ...

search event handlers for paginate.js. DMPRoadmap/roadmap#815

plan using generic search for paginable. DMPRoadmap/roadmap#815

from glyphicon to font-awesome for search icon. DMPRoadmap/roadmap#815

Fixed pagination for themes after changing policy. Sorted thmes by updated_at desc. DMPRoadmap/roadmap#869

server logic for themes index, new, create, edit and update actions. DMPRoadmap/roadmap#869 ...

client logic for themes new_edit view. DMPRoadmap/roadmap#869

functional tests for themes_controller. DMPRoadmap/roadmap#869

helper path instead of url_for. ThemePolicy without namespace. DMPRoadmap/roadmap#869