Fix breadcrumb rendering in new UI

[glennmatthews]

Closes: #n/a

What's Changed

Fix incorrect data reference in GenericView code that was causing breadcrumbs never to render correctly and always fall back to just displaying "Home". I think this is an alternative solution to #3957 and more preferable.

Before:

After:

TODO

• Explanation of Change(s)
• Added change log fragment(s) (for more information see the documentation)
• Attached Screenshots, Payload Example
• n/a Unit, Integration Tests
• n/a Documentation Updates (when adding/changing features)
• n/a Example Plugin Updates (when adding/changing features)
• Outline Remaining Work, Constraints from Design