Close Window - Close a pop-up screen
This action closes the dialog containing it (typically used within buttons defined in the
dialog, e.g. a Close or Cancel button).
The action traverses up the object hierarchy to find the closest containing dialog
(or, in older applications, pop-up of pop-in) and closes it. This means that if we have
a dialog within a dialog, then a Close Window inside the inner dialog will close
the inner dialog and return the user to the outer dialog.
Whatever is needed (or none if should be performed unconditionally).