get overlay preference
get overlay preference

c0ldice/c0ldice.github.io,wheelroute/osrm-frontend-wheelchair-electro,Project-OSRM/osrm-frontend-v2,wheelroute/osrm-frontend-wheelchair-normal,wheelroute/osrm-frontend-wheelchair-electro,sosm/osrm-frontend,Project-OSRM/osrm-frontend,yuryleb/osrm-frontend,sosm/osrm-frontend,Project-OSRM/osrm-frontend-v2,Project-OSRM/osrm-frontend,wheelroute/osrm-frontend-wheelchair-normal,yuryleb/osrm-frontend,sosm/osrm-frontend,c0ldice/c0ldice.github.io,Project-OSRM/osrm-frontend,yuryleb/osrm-frontend