use _.throttle instead of _.debounce, call `cancel` for immediate redraws
use _.throttle instead of _.debounce, call `cancel` for immediate redraws

AndreasHae/iD,bagage/iD,kartta-labs/iD,mapmeld/iD,1ec5/iD,bagage/iD,bagage/iD,1ec5/iD,kartta-labs/iD,edpop/iD,kartta-labs/iD,digidem/iD,1ec5/iD,openstreetmap/iD,openstreetmap/iD,AndreasHae/iD,mapmeld/iD,ngageoint/hootenanny-ui,digidem/iD,edpop/iD,ngageoint/hootenanny-ui,edpop/iD,openstreetmap/iD,mapmeld/iD,morray/iD,morray/iD,AndreasHae/iD,ngageoint/hootenanny-ui