When making a "new" property: No handler for field null of type http://www.w3.org/2002/07/owl#Ontology

[timbl]

To reproduce

• Make a new form or edit an old one
• In the dropdown menu for the Property of a field, select "*New" option

Error displayed on screen:

No handler for field null of type http://www.w3.org/2002/07/owl#Ontology

Thins it would be good to do here include:

• Just allow the user to give the URI of the property to be used.
• allow a new ontology to be created to put that new property in.
• search the ontology world for new ontologies and use one of them

[michielbdejong]

Let's assign a priority to this in the sprint planning on Wednesday