in the demo workplace under "Straight Controls / Menus / Client side copy&paste" no cut/copy/paste menu items appear.
In the editor t:systemmenuitem is not available under t:menu or t:popupmenu.
SYSTEMMENUITEM is not supported with the RISC client anymore. We will take the demo out of the demo workplace. Thanks for pointing us to this issue...
Please note: if setting CLIENTCONFIG-popupmenucopyclipboard to "true" then there will be a popup menu, by which the user can also copy the text of the current component.