Send node names when we open graphs
Send node names when we open graphs

When we open a CODAP graph using the node's graph button, we call
`createCollection` with the current node names and the time unit,
so that we can open up a useful graph even without data.

[#113104171]
concord-consortium/building-models,concord-consortium/building-models,concord-consortium/building-models,concord-consortium/building-models,concord-consortium/building-models