This is a general update to the UI in response to #46, #75, #53 and in-p...

...erson feedback. This unifies an "interaction color" for things like hover states, current pagination and sort, and the countries on the map.

Also included are a number of UI tweaks to try and focus on two regions of the interface - the tabbed displays, and the filter.
While more work may need to be done, this will close (for now) all three of the above issues.

Signed-off-by: Matt Bernhardt <mjbernha@mit.edu>