Disambiguate names with role and organisation

When selecting a name from a drop down list, editors need to be sure they are picking the correct person. This change adds a person's organisation and role (if they are available) in the drop down text.

https://www.agileplannerapp.com/boards/173808/cards/5172
I think this could, in certain edge cases, be misleading. For instance. say someone is the Minister of Bacon for the Department of Pig Products, and the Under-minister of Graphs for the Department of Devops. Is it possible that this code could return you “Bob Bobinson – Minister of Bacon – Department of Devops”?

I think you could fix this by using the `organisations` method on `role`, rather than on the person, so then you’d at least get a consistent role and department.