File Server defined as default, isn't the first element in the combobox of the post action.

Steps to reproduce:
1. Define a file server as default.
2. Go to workflows and add a new post function
3. Configure new post action
4. Define the Action: 'Upload File'
5. The default value for File Server is not appear in the combo box.

Note: The tag xml ('@selected') for the default value should be present in the field, as we have in this image