Rename callgraph js file.

Remove old callgraph and replace it with the new one.
Only include functions that are in the callgraph image.

By filtering out functions that are not in the graph we can give a much
nicer user experience as all the links navigate to new nodes in the
graph. This removes most landmines in the UI.
Add parent links to inline symbol view.

This makes the sidebar able to fully navigate the callgraph
visualization.