Input fields in Mif Menu integrated with Mif tree

Hi Moro, I'm trying to "integrate" an option in context  menu from this example http://mifjs.net/forum/viewtopic.php?id=64, with example of adding node with option before, after inside, so I could right-click any node and in context menu type name of new node. Is it possible? Or if not, how to do that in other way?

Regards
Paul