Dashboard overrides when launched with two different cell lists

I tried to launch two separate dashboards of two different cell lists so I can look at them at the same time. The data is very different in nature. The second dashboard overrides the first.

No file, test, or entry point is named. Start by reproducing the issue with two distinct cell lists and trace how launching a dashboard stores or reuses dashboard state. Done means both dashboards remain available simultaneously with their respective data.

Written by the indexing model from the issue text.