Verify which node.data will be published upon flow publish

[steve2507]

When running xiblepm flow publish <name>, the user should verifiy the NODE.data to be published. Although sensitive data should be vaulted and therefore not be part of this data, there could still be non-vault-fields that a user does not want to publish.
If there is no data outside the vault, simply publish immediately.

Whenever flow publishing has been implemented in the editor, the same principe should apply.