14. The system of claim 10 , wherein the dialog command manager identifies at least one of the commands to be performed from the dialog independent of a current preview state in the dialog based on one or more received null commands indicating the at least one of the commands are preview-independent.
10. The system of claim 8 , wherein the dialog routine comprises a dialog command manager that is installed if a dialog includes a preview control and that manages commands generated via the dialog based on whether received commands are subject to the preview control.