Allow users to set confidential attribute on Epic
User should be able to set confidential attribute when creating or updating an epic - we should update our private API (ee/app/controllers/groups/epics_controller.rb), REST API and GraphQL API to accept this attribute.
It should be allowed to set this attribute only if confidential_epics
feature flag is enabled for epic's group.
Frontend
On Epic List page, add Confidential checkbox to New Epic popover.
See design tab for latest mocks.
Related to #197339 (closed)
Edited by Donald Cook