Avoid accidential selections or enforce selection

When using a selection to reference to some entities or enums it is often usefull to force the user to select actively to avoid accidential selection. In this case one often adds a dummy selection to a list like "<please select>" or similar.

Perhaps you could add on option to the field reference/enum command to generate such a dummy entry on position 0 of the list to trigger the user to make a selection. In this case automatic validation will also be nice.

I think the best place is inside the create() and createForm() controller methods, but a centralized approach could be to add an optional parameter to the find methods of the entity.