Feature/save custom attributes

This is not where the problem is... Setting custom_attribute_values works without a problem and is not the issue. The issue is adding custom_attributes to full text search. The full text search properties only get cleared when the parent object changes (is dirty), but If we just create a few new attribute values like we do here (we don't really touch the parent object), the old values will not be cleared (again this only happens if the parent is dirty).

A solution would be to somehow mark the parent object as dirty when we update custom_attributes, but I'm not really sure how to do that, maybe setting an updated_at of the parent object here in this function might solve the problem, but I'm not sure.