f:all does not resolve label keys properly for child domain objects

Hello I have domains like this:

```
Charge{
BudgetIndex budgetIndex
}
BudgetIndex{
PaymentEnumType paymentType
}
```

page edit.gsp for Charge contains

```

```

/_field/budgetIndex/_input.gsp contains

```

```

When I enter /charge/edit/1
I see that labels for bean budgetIndex are defaults, not the ones I specified in message.properties.

Digging into the problem shows that this is because label is resolved with incorrect code

```
budgetIndex_$$_javassist_10.paymentType.label
```

The message code should have been:

```
budgetIndex.paymentType.label
```

Again, this is because of hibernate proxy objects.

To see the code I added println here:

```
private String resolveMessage(List keysInPreferenceOrder, String defaultMessage) {
def message = keysInPreferenceOrder.findResult { key ->
println "key = $key"
message(code: key, default: null) ?: null
}
message ?: defaultMessage
}
```

Start with the f:all tag and the resolveMessage method shown in the report, then reproduce the nested Charge and BudgetIndex form at /charge/edit/1. Compare the label keys produced for the child bean with the message.properties key, and verify that the expected label is used without the proxy-class suffix.

Written by the indexing model from the issue text.