Archive form ga

http://manage.dimagi.com/default.asp?114950#651164

Eventually should upgrade to Universal Analytics, which provides better handling of event tracking preceding a POST request (https://trello.com/c/19BjPlpx/64-upgrade-from-asynchronous-analytics-to-universal-analytics).  This avoids using setTimeout and is more reliable.  Since archive/restore form takes a while anyway, not a big deal to increase the total load time by 300 ms.