Don't drop already dropped markers
Don't drop already dropped markers

OpenTwinCities/adopt-a-tree,voyera/adopt-a-hydrant,openshift-quickstart/adopt-a-hydrant-openshift-quickstart,baraka101/dar-adopt-a-mtaro,codeforamerica/adopt-a-siren,billyfung/van-racks,Bryanprz/adopt-a-street,0111001101111010/adopt-a-spot-odu,codeforsavannah/adopt-a-garden,Bryanprz/adopt-a-street,eebbesen/adopt-a-tree,codeforanchorage/adopt-a-hydrant,openoakland/adopt-a-drain,codeforamerica/adopt-a-hydrant,mapmeld/Adopt-a-Siren-Macon,codefornigeria/adopt-a-hydrant,siruguri/adopt-a-drain,codeforamerica/adopt-a-hydrant,Bryanprz/adopt-a-street,akintoey/adopt-a-hydrant,CostantinB/adopt-a-hydrant,jasnow/adopt-a-hydrant,Stackato-Apps/adopt-a-hydrant,siruguri/adopt-a-drain,OpenTwinCities/adopt-a-tree,jamiekelly/adopt-a-hydrant,baraka101/dar-adopt-a-mtaro,openoakland/adopt-a-drain,billyfung/van-racks,jamiekelly/adopt-a-hydrant,akintoey/adopt-a-hydrant,t-pfaff/adopt-a-hydrant,Stackato-Apps/adopt-a-hydrant,friendlycode/adopt-a-hydrant,t-pfaff/adopt-a-hydrant,codeforanchorage/adopt-a-hydrant,code4sac/adopt-a-light,OpenTwinCities/adopt-a-tree,jasnow/adopt-a-hydrant,0111001101111010/adopt-a-spot-odu,code4sac/adopt-a-light,codeforamerica/adopt-a-hydrant,jamiekelly/adopt-a-hydrant,codeforboston/adopt-a-hydrant,openshift-quickstart/adopt-a-hydrant-openshift-quickstart,siruguri/adopt-a-drain,HackMichiana/adopt-a-bus-stop,OpenTwinCities/adopt-a-tree,eebbesen/adopt-a-tree,codeforboston/adopt-a-hydrant,Stackato-Apps/adopt-a-hydrant,CostantinB/adopt-a-hydrant,baraka101/dar-adopt-a-mtaro,openshift-quickstart/adopt-a-hydrant-openshift-quickstart,eebbesen/adopt-a-tree,voyera/adopt-a-hydrant,codefornigeria/adopt-a-hydrant,akintoey/adopt-a-hydrant,codeforamerica/adopt-a-siren,codeforsavannah/adopt-a-garden,friendlycode/adopt-a-hydrant,HackMichiana/adopt-a-bus-stop,codefornigeria/adopt-a-hydrant,friendlycode/adopt-a-hydrant,t-pfaff/adopt-a-hydrant,mapmeld/Adopt-a-Siren-Macon,voyera/adopt-a-hydrant,billyfung/van-racks,CostantinB/adopt-a-hydrant,jasnow/adopt-a-hydrant