Releases for Anti-Duplicates

- Issue #3264064 by lashabp, geoanders, matsbla: Move related content from sidebar to under the title field.
- Issue #3264247 by lashabp, geoanders: Display related content only in case of more than 0 results.

Add the option to disable form submission until clicking on "not a duplicate" button.

Add the "Disable form submission" option, wihch allows the user to disable the form submission, and only re-enable it when agreeing that the content is unique, by clicking on a "not a duplicate" link.