When working with action settings such as generate text action settings form defaults are not respected when changing models.

This is related to the funcitonality from MDL-82980

To reproduce:

1. Create a new AI provider for Open AI
2. Click the provider settings
3. Click settings for generate text
4. Under settings, set a value for "top_p", e.g 123
5. Click save changes
6. Click setting for generate text (again)
7. Change the model to "o1"
8. The form will reload but the defaut for "top_p" will not change it will still be 123.

The issue identified in step 8 is the issue, instead it should load the form defaul for that model.

This makes it very easy to accidentally to save the wrong value for the worng model.