Fix 81723894

fixes PT #81723894
https://www.pivotaltracker.com/story/show/81723894

overhaul to the "lozenge" and "pill" sub-navigation displayed within the workspaces
- new html element construction of the pill shapes for correct target area
- revised visual display
   * light color in resting state
   * brighter color in active state
   * steady color in currently-selected state

- additional changes propagated to other lozenges in the right sidebar