URL-based routing

[vipera]

It would be very practical if the UI could initially load an entry by its DN as given in the URL, and push history so that the back/forward actions move through selected entries, using vue-router for example.

This would let the application behave more like a conventional webpage, allowing links to be shared to particular entries, and refreshing the page to stay on the current DN.

[dnknth]

Thanks, nice idea, PRs welcome.