Configuration overview shows normal xml files

The file should start with one of the possible root elements from the `FrankDoc.xsd`.

Start by locating the configuration overview entry point and the code that identifies files using FrankDoc.xsd. Check how XML files are currently classified, then verify the overview only presents files whose root element is one of the schema's possible root elements. Confirm the behavior with the project's relevant checks or by reproducing it in the overview.

Written by the indexing model from the issue text.