Still figuring out the best way to markup pages for easy analysis in Google Tag Manager.  For now, the course explorer and the grade band course blocks on /courses for teachers get classes of clicktag for tracking clicks and linktag for tracking link follows.  Each gets a unique ID as well.

When tracking clicks, we want the click to come through on the element that has the class & ID set, so any children are set to not have pointer events.

Also just a couple other tweaks to match with what we want to receive in Google Tag Manager.