Synchronize JSON text view with module graph view

[mrnosal]

When the user selects the JSON text view of a module, the JSON viewer should scroll to and highlight the node currently selected in the graph view. If the user scrolls to a different location in the JSON viewer, they should be able to double-click text in the JSON view, and have the graph view select and center on the node representing the JSON text they clicked on.
There should be an explicit button to perform the same action.