improve card control menu style
style improvements, code cleanup
Style for results area

- ensure white bg (will need later if we add Facebook widget)
- add noticeable background to differentiate selected menu item
fix card visibility toggling bug

- previously, clicking a tab twice would
  toggle the visibility of the associated card/pane
  but actually we just want it to pull up the pane
classname changes / simplification

cleaning up leftovers from an experiment.