Navigation logic is inconsistent

As a user, if I

1. Open a new tab,
2. Go to the entry list,
3. Open an entry to edit,
4. Save it, thereby going back to the entry list, and
5. Press the "back button"

I would expect to go back to the entry but instead I go to the "new tab" page for by browser. This is because the "go back" button in the app, shouldn't have the semantics of the "back button" in the browser: I'm not going back in history, I am progressing forward by navigating to the asset list.

We need to revisit this since cancelling navigation via the prompt added to address #62 (closed) can further complicate this history stack.