Steps to reproduce:

1. Create a new project using the Universal 3D template
2. Install the Behavior package (com.unity.behavior)
3. Create a new Blackboard asset (Assets > Create > Behavior > Blackboard)
4. Open the Blackboard
5. Click the "+" button and select Event
6. Click the "Create new event channel type..."
7. Enter a very long name
8. Click the "Next" button
9. Enter anything into the description field
10. Click the "Create" button
11. Observe the popup

Actual results: The "Save" button is greyed out because the name is too long

Expected results: The Event name field should have a character limit so that the Event could always be created and saved

Reproducible with versions: 1.0.15 (6000.0.69f1, 6000.3.10f1, 6000.4.0b11, 6000.5.0a8)

Tested on (OS): MacOS Silicon Tahoe 26.2