Recent Activity / Comments Link, Fixes #1780

If the item in an activity feed is a comment, then append the "#comments" fragment to the target url.  When you click the link, the comments tab opens up (not really sure where this happens in the javascript.  Angular??) and the browser scrolls to that area.  Special note, after the layer preview loads, the browser loses its place on the comments section.  To make the page actually stay focused on the comments section, we need to specify the layout (including width/height of the map and other components) within the html before the CSS and javascript execute.  That will require a lot of work and is as high-priority.