merge menu will create submenu item, for Example
if Main menu contains - File,Edit and Help, and Contextmenu - Open
if you merge context menu to Main menu then - it will like
Main Menu | Open.
this format, but if your intension is to insert edit menu to the context menu,
you cant merge to contextmenu, it can be done with the context menuitem, here you can merge the open menuitem to the edit menuitem
context menu is menu, so we can merge it with menu not menuitem.
if you realy want to assign Main menu's menuitem to the Context menu, you can use this method