Inactive "Skinning Editor" toolbar overlaps the help box in the "Sprite Editor" when asset is not editable

Steps to reproduce:

1. Create a new Universal 2D project
2. In the Hierarchy, right-click -> 2D Object -> Sprites -> Circle
3. Select the created GameObject
4. Click "Open Sprite Editor" in the Hierarchy window
5. Observe the displayed help box with the message "Editing is disabled because the asset is not editable"
6. Expand the "Sprite Editor" drop-down and select the "Skinning Editor" option
7. Observe the result

Actual results: The inactive toolbar is displayed, which overlaps the help box

Expected results: The help box position should be updated so that overlapping would be avoided

Reproducible with versions: 6000.0.65f1, 6000.3.3f1, 6000.4.0b3, 6000.5.0a4

Tested on (OS): macOS - Tahoe 26.2