Track additional events

The goal is to eventually add tracking for the following actions:

* Click the "help" button at the top of the page
* Hover over the "more info" icons

This is an early review so that I can get early directional feedback before investing too heavily in a particular approach.
Seems reasonable, I was a bit concerned about messing up the page lifecycle. Still don't fully understand what all the moving parts are here and how they interact, so I was following the pattern of the other pages.

I'll do some more digging to see how/if I can ensure load/init-page is called on every page.