Fully persist app state

[forman]

When a user closes the tab and reopens the app a momment later or if the app redirects to the user's account page we need to fully restore the apps state.

Currently cate stores just "preferences" (its internal session state) in the backend. To fully recover state we need other state information too, such as the current configuration of views, and possibly more. We should also ask the server for currently running jobs.