How to reproduce:
1. Create a new Unity project
2. Go to Window -> Package Management -> Package Manager -> Unity Registry -> ECS -> Install
3. Go to Window -> Entities -> Systems
4. Enter the Play Mode
5. In the Systems window, narrow down the "Systems" Column
6. Right-click on the "Systems" Column -> Resize To Fit
7. Observe the results

Expected results: The column is resized so the content is visible
Actual results: The column is smaller than the default size and the content is not visible

Reproducible with: 6000.5.0a5
Can't test with: 6000.0.66f1, 6000.4.0b5, 6000.5.0a1 (No such functionality)

Reproducible on: macOS Tahoe 26 (M1)
Not reproducible on: No other environment tested