Add test case for callback function returning false
Add test case for callback function returning false

AndreasHae/iD,digidem/iD,andreic-telenav/iD,edpop/iD,1ec5/iD,digidem/iD,bagage/iD,openstreetmap/iD,openstreetmap/iD,kartta-labs/iD,kepta/iD,energiekollektiv/openmod.sh-id,mapmeld/iD,zbycz/iD,AndreasHae/iD,mapmeld/iD,morray/iD,ngageoint/hootenanny-ui,morray/iD,AndreasHae/iD,1ec5/iD,edpop/iD,tbicr/iD,kartta-labs/iD,edpop/iD,energiekollektiv/openmod.sh-id,bagage/iD,zbycz/iD,ngageoint/hootenanny-ui,tbicr/iD,mapmeld/iD,ngageoint/hootenanny-ui,openstreetmap/iD,andreic-telenav/iD,1ec5/iD,bagage/iD,kepta/iD,kartta-labs/iD