This item can trigger various actions.
If there are one or more icons selected on the desktop they are
opened as if you had made a double-click on it.
If there is an item selected in the top window it will be
opened as if you had made a double-click on it.
If none of these conditions apply, the File Selector is called
to load a resource file (Selectric, Boxkite, Freedom and all other
file selectors creating a corresponding cookie are supported).