Steps to reproduce:

1. Open a new Unity project
2. Go to Window → Search → New Window
3. Ensure Toggle Search Query Builder Mode is enabled
4. Click the Toggle Saved Search Panel
5. In the Builtins/Reports dropdown, select any of the options
6. Dock the Search window

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Actual results: 

• Console logs error:

{code:java}
No measure function set in this node's config
UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&) (at /home/bokken/build/output/unity/unity/Modules/IMGUI/GUIUtility.cs:224)
{code}

• Scene view goes blank after docking the Search window

Expected results: Docking the Search window should not trigger errors. The Scene view should remain visible and functional

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Reproducible with versions: 6000.3.0b1

Can’t test with versions: 6000.0.56f1, 6000.1.16f1, 6000.2.4f1, 6000.3.0a1 (No Builtin dropdown sections)

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Tested on (OS): Ubuntu 22.04, macOS 15.6