VisualElementReference Object Picker displays the default "NewUXMLTemplate" at the top instead of the Root Visual Element

Steps to reproduce:

1. Create a new project
2. Create and instantiate a new script in the Hierarchy
   1. Inside the script, declare a public VisualElementReference object
3. Save and focus on the Editor
4. Create a new UI Document "Test.uxml"
5. Add a VisualElement to the Hierarchy in UI Builder and save the changes
6. Open the VisualElementReference object picker in the Inspector and observe

Actual results: The "Test" element is at the top as the root of all the other elements

Expected results: Either:

• NewUXMLTemplate is not available, or
• "Test" is a child of NewUXMLTemplate and the parent of all the other VisualElements

Reproducible with versions: 6000.6.0a5

Can’t test with versions: 6000.0.75f1, 6000.3.15f1, 6000.4.7f1, 6000.5.0b8, 6000.6.0a4 (No hierarchical structure in Object Picker window)

Tested on (OS): Windows 11 Pro (25H2)

Notes: 

• This can be confusing, as there is no reference to "NewUXMLTemplate" inside the UXML file if it is renamed