Recursive view model results in PageSecurity infinite recursion

Authorization goes into infinite recursion on recursively defined view models.

Example of problematic view model:
```
// View model `App.FooViewModel`
{
    "NodeTemplate": {
        // ...
       "Children": [
            {
                "$": {
                    "Reuse": "App.FooViewModel.NodeTemplateJson"
                }
            }
       ]
    }
}
```