Workflows; Workflow Items within am Item Group were not being validated

Workflow Items within am Item Group were not being validated.

This would not generally be a problem since Items are validated upon saving a Workflow Type and Items are generally duplicated from a Workflow Type Item.

However, Script code can create and modify Workflow Items and they should therefore be validated upon saving.

NOTE: Existing Workflow Items will not be validated unless something is changed on them since this could cause existing, invalid items to fail.