Comment 3 for bug 859714

I have committed this workaround to avoid a crash on load

http://bazaar.launchpad.net/~schooltool-owners/schooltool.intervention/flourish/revision/314

but the widget implementation is weird. If there are any errors, selected persons are what was before, does not remember changes.

Also sometimes there is a person with an empty brackets, e.g. Herbert Dawson () . Not sure what they are.