If you have your class and you want to create a pull right menu on a property node for it, you can use the colon ( to separate property items for it. Just right click on the class » Properties » Item Settings » Localized name.
Also, on a separate note and since I'm in the neighborhood, you could also take advantage of the "Documentation" tab in the Class properties to change the "Localized name" from the default (in my case, "NI_VSA.lvclass") to something shorter or more meaningful. .This makes it easier on the eye.
Regards