Predefined actions enabled according to context

Some predefined actions (such as insert, append and delete in INPUT ARRAY) are enabled and disabled automatically by the dialog according to the context (for example, when a static array used by the INPUT ARRAY is full, the insert and append actions get disabled).

Even when overwriting such actions with your own action handler, the runtime system will continue to enable and disabled the actions automatically.

You should not overwrite predefined actions.