Steps to reproduce:

1. Create a new Unity project using the Universal 3D template
2. Create a new "Cube" GameObject (GameObject > 3d Object > Cube)
3. Open the Animation window (Window > Animation > Animation)
4. Create a new animation by pressing the "Create" button in the Animation window
5. Open the Animator window (Window > Animation > Animator)
6. Click "Layers" button in the Animator window
7. Create a new layer with a very long name
8. Observe the Animator window

Actual results: The "Auto Live Link" button disappears because the layer name is too long

Expected results: The layer name either has a limit of characters or is truncated in the Animator window

Reproducible with versions: 2021.3.51f1, 2022.3.64f1, 6000.0.52f1, 6000.1.9f1, 6000.2.0b8, 6000.3.0a1

Tested on (OS): macOS Silicon Sequoia 15.5

Notes:

• Reproduces whether the window is docked or not, and if fullscreen or not