Graph editor contextual menu

The Graph editor has various contextual menus depending on what is selected in the graph.

• Create node: Choose from the list of node categories a new to add node to the Graph.
• Create group: Visually gather nodes in a group in the Graph, for example, all nodes that are involved in a task, such as erosion, etc. You can also create an unlimited number of groups of nodes within groups.
• Create component: Create components from nodes in the graph, each with their own parameters, and add inputs and outputs to the component's nodes.
• Rename: Add and update a node name.
• Add comment: Add and edit comments.
• Replace with a compatible node: Replace the node with a compatible node from the list.
• Replace with any node: Replace the node with any node.