Don't commit empty changesets.. (closes #1483)
Don't commit empty changesets.. (closes #1483)

instead, silently flush context and return to browse mode

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