Scene remains dirty when undoing a Light Type or Mode change from Lighting Search

Steps to reproduce:

1. Create a new 3D URP project
2. Go to Windows > Rendering > Lighting Search
3. Find the "Directional Light" GameObject in the search list
4. In the "Type" or "Mode" columns, click on the dropdown and change to any other option
5. Click Ctrl+Z  to undo
6. Observe the dirty flag next the Scene name

Actual results: The value is undone, but the Scene remains dirty when undoing changes

Expected results: The Scene dirty flag is cleared after undoing the change if no other Scene modifications remain

Reproducible with versions: 6000.5.0b5, 6000.5.0b9, 6000.6.0a5

Can’t test with versions: 6000.0.75f1, 6000.3.16f1, 6000.4.7f1 (No Search integration), 6000.5.0b1 (Undo did not work [Internal link])

Tested on (OS): macOS 26.5

Notes:

• Reproduces only with the Light Type and Mode dropdowns in Lighting Search
• Does not reproduce with other editable values in Lighting Search. Those values undo correctly and do not leave the Scene dirty
• Does not reproduce when changing the same values through the Inspector and undoing