[nojira] -- Engagement Index Ready to Demo

**PR Crucial for today's meeting**

**Updates:**
*Removed button header sort
*Made code more efficient (from landing page --> the two other views)
*Fixed current user highlighting
*Removed current user score blue alert info wrapper
@christianv If I move it up one level, the highlighting effect I want to have for each <th> won't work properly. Specifically, if I moved it up one level, every time I hover over one of the <th>, all of the <th> will be highlighted.