Use browser router for Account Console

[jonkoops]

The router for the Account Console uses the hash based router, but should be changed to the browser based one, which is the recommended router for React Router projects. This will allow the usage of real paths for URLs rather than 'fake' paths that use a hash (#).

The main motivation, aside from the React Router recommendation, is that this will allow us to use the same paths for local development, as well as in production. This reduces the surface for bugs, and also makes easier to do end-to-end testing without adding exceptions.