Prevent navigating to "Preview" or "Publish" for Screener's without Forms #319
Description
User Story
As a user of BDT, I would like for the Preview and Publish tabs of the Screener builder to be inaccessible until the Screener has defined a Form using the Form Editor, to avoid confusion.
Acceptance Criteria
- When the currently selected Screener does not have a Form defined or has an empty Form, the "Preview" and "Publish" tabs are unclickable.
- The "Publish Screener" API endpoint should reject a request to Publish a Screener that does not have a Form defined or has an empty Form.