Animation/Clip name is not truncated and cannot be resized to show fully in the Clips dropdown when the Animation name is very long

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. Select the newly added Cube GameObject in the Hierarchy window
4. Open the Animation window (Window > Animation > Animation)
5. Create a new Animation with a long name
6. Observe the Animation clips dropdown in the Animation window

Actual results: The full Animation name does not fit, is not truncated and the field cannot be resized to show the full Animation name

Expected results: Either the Animation name is truncated or the field can be resized to show the full Animation name

Reproducible with versions: 2023.1.0a3, 6000.0.69f1, 6000.3.10f1, 6000.4.0b11, 6000.5.0a8

Tested on (OS): MacOS Silicon Tahoe 26.2, Ubuntu 24.04