Add the ability to make the graph editor a controlled component

[roppazvan]

• We need to be able to pass down its state and also add an onChange handler to the editor. There are situations when we need the graph editor to be controlled. For example in the studio dynamic sets we have the table view. For it to display the latest graph state, without having to save the graph and refetch, we need to save the graph state locally.

[SorsOps]

We should be able to address this in V2 by allowing you to update the input value for a node directly when a value remotely changes