How to reproduce:
1. Create a new Unity project
2. In the Hierarchy, right-click -> 3D Object -> Terrain
3. In the Inspector, switch to the "Paint Terrain" mode
4. Switch to the "Raise or Lower Terrain"
5. In the Scene view, navigate to the brush settings Overlay
6. Observe the results

Expected results: The dropdown is grayed out because this brush has no additional settings
Actual results: The dropdown can be clicked and the tooltip "This tool has no extra tool settings!" is thrown

Reproducible with: 6000.0.58f1, 6000.2.5f1, 6000.3.0b2

Reproducible on: macOS Sequoia 15.6 (M1)
Not reproducible on: No other environment tested

Note: The tooltip is also thrown with an offset