The idea is basically to allow for the customization of the error
message that's raised during ``validate_unique()``.
Widget with this Account and Name already exists.
More Useful Error:
You already have a Widget with this Name.
(The only key difference is that if a field is hidden like "Account",
I don't necessarily want the client to see it.)
The only idea I have for a solution is:
unique_together = (('account', 'name', 'You already have a
Widget with this Name.'),)