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.
There was a bug here, `render()` was being called here and in clickable-view.js

This resulted in the click handler being registered twice, which in turn caused two events to be emitted when there should have been one.