Multi-output, multi-class
Select an output and the class id selector will appear.
Multi-output
Both outputs are not multiclass. If only one of them is selected, the no class id will be
automaticalyl selected and the class id selector will not be visible. If both outputs are
selected, the class id selector will become visible.
Multi-class
Since there is only one output, it should be selected automatically and we should see the
class selector by default.
Single-output
Since there is only one output and no class, both should be selected automatically.