updating selected watershed does not update graphs

[corviday]

To reproduce:

• Select a watershed from the region dropdown below map
• select a variable on the "Yearly Indicators" tab
• wait for the graph to load
• select a different watershed on the region dropdown
• graph won't update!

This holds true for the other graph tabs as well.

A bit puzzling - the salmon population tables do update, so the issue does not seem to be that DataDisplay is not passing updated regions to its children correctly - graphs and tables are all children of DataDisplay. Check react hooks for correct usage.