brings back the parkfilter fix, which didn't survive my merge, and changes park opacity on map
brings back the parkfilter fix, which didn't survive my merge, and changes park opacity on map

codeforboston/bostongreenmap,MAPC/bostonparks,varmas/bostongreenmap,varmas/bostongreenmap,codeforboston/bostongreenmap,varmas/bostongreenmap,MAPC/bostonparks,varmas/bostongreenmap,varmas/bostongreenmap,codeforboston/bostongreenmap,codeforboston/bostongreenmap,codeforboston/bostongreenmap