New design for Special:AccountInfo

* Full user agent is now displayed when clicking
  on the parsed version
* Timestamp of row is shown
* If both RecentChanges and CheckUser are enabled, only
  CheckUser table will show up
* "Information in (CheckUser|RecentChanges)" headings
  were removed.
* And more!

Change-Id: I0d8f98273bfad3489c1c9c704e544b7fd6089d80
Co-Authored-By: Prateek Saxena <prtksxna@gmail.com>