"Train" button is displayed as active when model misses needed setup

Steps to reproduce:

1. Create a new Unity project
2. Make sure the AI Assistant package/s are installed
3. Go to "Window" -> "AI" ->"Model Trainer"
4. Verify that the "Model Trainer" window opens
5. Click "New Model"
6. Go to the model details window
7. Observe that the "Train" button is displayed as active from the beginning, even though it misses inputs/data from the user side

Actual results: The "Train" button is displayed as active, and the user can click it. When he does it, he gets an additional pop-up that informs him that the needed setup for the workflow is not finished.

Expected results: The "Train" button is initially disabled. A tooltip explains what actions are required to enable it. Once the required actions are completed, the button becomes enabled. This workflow would be more user friendly.

Reproducible with versions: 1.0.0-pre.14 (6000.3.0a1)

Not reproducible with versions: -

Can’t test with versions: -

Tested on (OS): M1 Max - Sequoia 15.5

Note: In the "Affects Versions" field, I listed 1.0.0-pre.13 version as 1.0.0-pre.14 was not available.