Add name change bar to editor

[faximilie]

This change just adds a small bar in the bottom right next to the search bar that allows users to name their nodes

It updates when you change selected nodes.

There was a similar pull request that I closed accidentally

[fian46]

You need to wrap any operation inside undo redo action to trigger save action inside editor. Also you need to update the connection properly inside undo redo too. In editor i make hard coded root name for root node. Please not allowing to change root name because it will failing save procedure.