Bug: Built-in device model can be removed

[adcoly]

Expected Behavior

When I create a device model via the API with built-in parameter equal true, I should have a device model that can't be removed through the portal web interface.

Current Behavior

At the moment, the device can't be removed from the model list view.

But if we go to the model detail, the 'delete' button is available and working.

Steps to Reproduce

• Create a device model from the API with 'builtIn = true'
• Connect to the portal.
• Head to the detail page of the newly created model.
• Click on the 'Delete' button

Context (Environment)

Portal version: 4.13.2
LoRaWAN Stack version: 2.2.0