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
If I understand this correctly, `roles` will return both current and historic roles; I would imagine we only want currently active roles.