add a way to save (and restore) the current state
The old CGI application used the hash part of the URL to save the value of all its parameters, allowing browser history to work like undo/redo, and making it easy to share a link with somebody else.
This web app does not do that anymore. It would be nice to have some way to save the entire state of the React application. It could be via an URL that is automatically updated on each action (as we did in the old CGI script), or via an explicit "share" button that generates a URL the application is able to read back.
I would also like to have a way to start the application in a specific tab.