(regressed in 916a901)
916a901
* 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
* move GPX and Mapillary layers to Map Data * put feature filters and layer data into show/hide containers * cleanup css
(rebased to master post-Mapillary merge)