How to reproduce:
1. Import the "Dragon Crasher" sample into the Unity
2. In the project window navigate to Assets -> Tilemaps -> _Palettes
3. In the Scene view click "Open Tile Palette"
4. Make sure the Tile Palette window is docked
5. Minimize the width of the window to its minimum size
6. Observe the window

Expected results: All controls are visible and can be accessed in the window
Actual results: Brush picking dropdown takes the whole space

Reproducible with: 6000.0.5f1, 6000.0.10f1
Not reproducible with: 2021.3.40f1, 2022.3.36f1, 6000.0.4f1

Reproducible on: macOS 14.5 Sonoma (Apple Silicon), Windows 10 (22H2)
Not reproducible on: No other environment tested