The "Importing a CAD Model into Unity" tutorial opens a second, floating Hierarchy window

Steps to reproduce:

1. Create a new project from the Industry Fundamentals template
2. Sign in to the Editor with an account that has a Unity Industry license (required - the Asset Transformer Toolkit is an entitled package)
3. Open Window > Package Management > Package Manager
4. In the Unity Registry section, search for the Asset Transformer Toolkit
5. Install Asset Transformer Toolkit ex Pixyz and wait for the installation to finish
6. On the Asset Transformer toolbar at the bottom of the Scene view, click the Import Model button (not the arrow next to it)
7. In the file browser, open Assets/CADModel/Robot/moto.SLDASM
8. In the Inspector, click Import and wait for the import to finish
9. In the Tutorials window, open Importing a CAD Model into Unity and go through its steps

Actual results: A second, floating Hierarchy window opens

Expected results: The docked Hierarchy window is highlighted and no second window opens

Reproducible with versions: 1.0.4 (6000.6.0b1, 6000.6.6f1, 6000.7.0b5, 7000.0.0a8, 7000.0.0a10)

Not reproducible with versions: 1.0.4 (6000.4.12f1, 6000.5.11f1, 6000.6.0a7)

Can't test with version 1.0.4 (6000.3.26f1) - the template's scripts do not compile (RobotManager.cs(42,23): error CS1501)

Tested on (OS): macOS 27.0

Note: The regression is in the 6000.6.0b1 Editor version