* replace full width bottom bar with subtle list item
* move hidden feature details to list item tooltip
* simplify some of the text labels on the Map Data panel
* progressively hide some footer elements with media queries
* implemented as css classes on surface element
* patterned fills can be done with css too.. removed the
code from areas.js to set patterned fill on each element)
* dummy test code in `map_data.js` uses 'w' key to toggle..