Some resource classes receive no created/modified properties

Source passages and research passages currently never receive created/modified properties. Not when added via the modal popup nor from the "add passage" in the "all source/research passages" overview nor when the bug #56 (closed) occurs.

Egotext passages also don't receive created/modified properties currently when added via "add passage" in the "all egotext passages" overview nor when the bug #56 (closed) occurs. They do receive the properties when created from within the annotation form.