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 -> make sure to dock the window
4. Enter the Play Mode
5. In the Systems window, enter any string that doesn't have matches in the search bar and resize the columns so the scrollbar appears
6. Exit and reenter the Play Mode and observe the "No System Matches Your Search" message in the "Systems" window

Expected results: The message text wraps correctly
Actual results: The message is not wrapped unless you move something inside the window

Reproducible with: 6000.5.0a5
Not reproducible with: 6000.0.66f1, 6000.4.0b5, 6000.5.0a4

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