Hierarchy dropdown buttons cut off Layer and Tag names instead of truncating names with ellipsis when column is set to smaller size

Steps to reproduce:
1. Create new Unity project
2. Right-click on the header of the Hierarchy Window
3. Enable Layer Column
4. Create a Cube GameObject in Hierarchy window
5. Click on Cube GameObject Layer and from dropdown select “Add Tag...”
6. In Inspector window > Tags and Layers > open Layers
7. In “User Layer 10” add a layer name “PlayerNameLayerTesting”
8. Observe the Cube’s Layer dropdown in the Hierarchy

Actual results: When using longer Layer or Tag name, names gets cut off in Hierarchy’s dropdowns

Expected results: Longer Layer or Tag names should not be cut off, names are truncated with an ellipsis (…)

Reproducible with versions: 6000.3.8f1, 6000.4.0b8, 6000.5.0a6

Can’t test with versions: 6000.0.66f2 (New Hierarchy window is not available)

Tested on (OS): macOS Silicon Tahoe 26.2 (M1)