Add border around all "object" types
### Feature Description

When you create an array of devices, each `object` has a border around it. `Switch 1 settings` and `Switch 2 settings` below, by nature of being members in the array :
```
      "devices": {
        "type": "array",
        "items": {
          "type": "object",
          "properties": {
            ...
          }
        }
      }
```
<img width="795" alt="384359079-883bc901-f379-4fce-a2c1-634cb7ab28d1" src="https://github.com/user-attachments/assets/31597c86-e0d1-4888-9602-ba22b30650ad">
<p>

The two items above are actually movable `<div>`, although, even if `"orderable": false,` is added to the array, they are still rendered with a border.

I am suggesting adding a border around any `object` that is a property of an `object`. Here each `Device` object gets a border by being an item in the `devices` array. `specialDeviceProperties` should get a border to denote the grouping of `Some Special Property` and `Some Awesome Property`. Especially if `specialDeviceProperties` is conditional on the value of another property, this highlights that this is a section of grouped characteristics.
```
      "devices": {
        "type": "array",
        "items": {
          "title": "Device",
          "type": "object",    <- gets border as item in array
          "properties": {
            "name": {
              "title": "Name",
              "type": "string",
            },
            "isSpecialDevice": {
              "title": "Device Is Special",
              "type": "boolean",
            },
            "specialDeviceProperties": {
              "title": "Device",
              "type": "object",    <- should get border as section/group of properties
              "properties": {
                "color": {
                  "title": "Some Special Property",
                  "type": "string"
                },
                "type": {
                  "title": "Some Awesome Property",
                  "type": "string"
                }
              },
              "condition": {
                "functionBody": "return model.devices[arrayIndices].isSpecialDevice === true;"
              }
            }
          }
        }
      }
```
