Support sorting by date in the console view

Our buildbot instance runs builds after every commit as well as nightly builds. We also have a force scheduler for each builder. In the console view, the forced builds and nightly builds show up first, followed by the commit triggered builds (see screenshot). I think this is happening because in buildbot/www/console_view/src/module/console.tpl.jade the changes are sorted by changeid, and I assume that the builds that were triggered by the nightly or force schedulers do not have changeids, so those sort first.

It would be very useful if there was the option to sort chronologically instead, so we could see the events that triggered the build in chronological order.