Open Vizs for newly added components

[AdRiley]

When a component is first added to the graph, its visualisation should be open.

[farmaazon]

If multiple nodes are added (e.g. because of Visualization API), open the last, or add an option to the API.

[farmaazon]

Refinement notes:

• New nodes should have set "visualization opened" in metadata.
• Paste should preserve md of copied component. If no md, do not open visualization.
• Fix panning to node after creating it from visualization.