Broken page / Broken link reports do not work with elemental content area

[maxime-rainville]

Description

The "broken link" and "page with broken file" report do not include page with elemental area containing broken links.

Steps to reproduce

• Create a new elemental page
• Add content block.
• Add a link to a new file in the content block
• Add a link to a new page in the content block
• Publish the elemental page
• Archived the new page and delete the new file.
• Go look at the reports

Expected behavior: The elemental page should appear the broken link report and the page with broken files report.

Actual behaviour: It doesn't.

[brynwhyman]

Related: silverstripe/silverstripe-externallinks#37

[chillu]

This issue should live in elemental repo, could you recreate it there?

[maxime-rainville]

Moved to silverstripe/silverstripe-elemental#689