Adding to a built in popup submenu

I wrote a little code to put the rgb "colorString" (as in modifygraph rgb=[colorString]) of a trace on the clipboard (in the same manner as right clicking a trace to put its full path on the clipboard, etc.). I had expected my submenu option to be in the "Copy" submenu, but it instead creates a second "Copy" submenu in the trace popup. Is there a way to put it in the built-in submenu? Thanks in advance!

Menu "TracePopup"
    Submenu "Copy"
        "ModifyGraph RGB(A)", /Q, traceColorToClip()
    end
End

Function traceColorToClip()
    GetLastUserMenuInfo
    String info = traceinfo(S_graphname,S_tracename,0)
    String easyInfo = "dummy~" + replacestring("RECREATION:",info,"|RECREATION~",1) + "|"
    String recreation = Stringbykey("RECREATION",easyInfo,"~","|",1)        //recreation is the last key, so put in a nonsense sepStr to get the entirety of the string from RECREATION: on
    String rgb = StringByKey("rgb(x)", recreation,"=")
    putscraptext rgb
End

 

To make my question a little more concrete, here's a picture of the trace popup menu the code above produces. There are two "Copy" submenus. I'd like to combine them into one (retaining all the built-in submenu items).

 

 

Duplicate submenus screenshot (78.95 KB)

Appending user menu items to the TracePopup's Copy submenu is not possible in the current version(s) of Igor, sorry.