Morpho

Whn adding a research project in the DPW, a party was chosen from the references
list and a role selected. When returning to that screen and editing the
original party, the role is lost, and the package is invalid.

Steps to reproduce:
1) Open morpho, start DPW, enter title and "User One" as creator and one contact
2) Proceed to project screen, fill in project title, add reference to "User One"
3) Select role for "User One" to be "Principal Investigator" and hit "OK"
4) Click "Edit" to edit the party you just entered
5) Check the "Do you want to edit the above information?" box and make a change
and hit "OK"
6) Note that the role is no longer present in the summary list
7) proceed through wizard and save document, which is now invalid due to missing
role