Where are the "Display in actions box" properties for a worklist used?

I just created a new worklist for a workflow. The properties page for the worklist show a group of properties called "Display in actions box".

It looks like the same group that exists on the transition properties page. But in the case of transitions, the "Display in actions box" information is used to create the transition links on the state menu for the content item.

I cannot find any documentation on that, and am not able to see where the info is used anywhere in Plone interface.

Can anyone give me a light on that?