Monitor view: View a shorter user agent guess via User-Agent detection

[jviide]

User-Agents take a lot of space in the monitor view. We could use something like browscap-js or node-browscap to perform an educated guess about the browser (or crawler etc.) based on the UA string and show the guess.

It would probably be a good idea to signal that the guess is just that: a guess, along with a way to view the full UA string.