v2.1 - Unity 2018.1+

This version uses a freshly new Unity feature introduced in 2018.1.0a5 that allows to retrieve the list of all the PlayableGraphs. And it is now possible to name PlayableGraphs, so that the PlayableGraphs created by components are easier to find.

Here is a "before-after" screenshot of the same scene where you'll see how the graphs coming from Animator and PlayableDirector component are displayed, as well as a custom graphs (appropriately called "CustomGraph"):

Before	After

Notes:

• Yep, before, graphs with the same name could hide each others.
• You can still use previous versions of graph-visualizer with Unity 2018.1.