The `upgrade_boolean` widget should display an `Enterprise` label next to it.
There is however an issue when a `label` is specified for this field. In this case,
the `Enterprise` label should be placed next to the field label (and not the field
itself).
The easiest solution would have been to instantiate the field widget with its label,
but this can't work because the field widget is instantiated before its label.
We thus re-render the widget after its label creation.
Martin Geubelle