[Extensibility Requests] ShowAsTree Property

### Why do you need this change?

Hi,
the ShowAsTree Property in the page list accepts boolean literal true/false. 
Would it be possible to allow assigning a boolean parameter/expression to the property?

<img width="1154" height="121" alt="Image" src="https://github.com/user-attachments/assets/574ae9e8-6e85-48dd-8374-2081d12d6fa2" />

### Describe the request

.