Steps to reproduce

1. In pages app, create a new page with basic template
2. Add text and image element containing a reference to an asset
3. Select the page in the tree view and press add to campaign (new)
4. Mark checkbox include referenced resources and save changes.

Expected results

Both the page and the asset are added to campaign

Actual results

Only page is added to campaign

Workaround

Add the referred elements manually to the campaign in the corresponding content app (the asset in dam app in the example above)

Development notes

This is occurring when calling info.magnolia.campaignpublisher.ui.action.AddToCampaignFormAction.addReferencesFrom(Node, Node, String) as it always finds no references. This is because when calling getReferencesFrom there's a hardcoded null value in referenceProperties parameter, which would always result in no references.