CheckboxSet field doesn't load member data into forms

[sharvey]

The fourth argument for a CheckboxSetField? is supposed to be an array which loads the data from the member into the checkboxes on a form, but it doesn't work. It appears to not have been setup for this type of field, unlike a TextField?.

Example:

new CheckboxSetField?(

"NewsletterSubscriptions?", "Receive email notification of events in ", $sourceitems = DataObject::get("NewsletterType?")->toDropDownMap("GroupID","Title"), $selectedgroups = $member ? $member->Groups()->Map("ID","Title") : false )

);

Once you save the form with this it doesn't populate itself with the array when you use $this->loadNonBlankDataFrom($member).

[sminnee]

Let's get this sorted. Making the basic behaviour of our core classes more consistent / reliable is going to speed up development of all our sites :-)