[react] State management

[andrewazores]

As detailed in some recent PR comments:

#73 (comment)

We need to investigate client-side state management to simplify how different views can share the same application state, rather than needing to reinitialize their own local view of the state when mounted, and also to help prevent spurious data refreshes when things update that are not really local client state (ex. button clicks to expand/collapse menus etc.) but rather simple view state.