fix border radius problem on buttons.
fix border radius problem on buttons.

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