The action type this button represents. Possible values are "lock", "logout", "run", "search" and "screenshot". This key is only relevant if the object_type key is "action-applet".
Botoiaren ekintza-mota. Balio posibleak: "lock", "logout", "run", "search" eta "screenshot". object_type gakoa "action-applet" denerako bakarrik.