changed max saved history limit to 20
changed max saved history limit to 20

DigitalCoder/cartodb,nyimbi/cartodb,bloomberg/cartodb,nuxcode/cartodb,codeandtheory/cartodb,raquel-ucl/cartodb,nyimbi/cartodb,future-analytics/cartodb,DigitalCoder/cartodb,UCL-ShippingGroup/cartodb-1,DigitalCoder/cartodb,dbirchak/cartodb,future-analytics/cartodb,nyimbi/cartodb,raquel-ucl/cartodb,UCL-ShippingGroup/cartodb-1,raquel-ucl/cartodb,dbirchak/cartodb,nuxcode/cartodb,CartoDB/cartodb,nyimbi/cartodb,codeandtheory/cartodb,dbirchak/cartodb,DigitalCoder/cartodb,thorncp/cartodb,future-analytics/cartodb,thorncp/cartodb,thorncp/cartodb,dbirchak/cartodb,DigitalCoder/cartodb,nuxcode/cartodb,CartoDB/cartodb,raquel-ucl/cartodb,CartoDB/cartodb,raquel-ucl/cartodb,CartoDB/cartodb,UCL-ShippingGroup/cartodb-1,bloomberg/cartodb,splashblot/dronedb,codeandtheory/cartodb,splashblot/dronedb,splashblot/dronedb,nuxcode/cartodb,CartoDB/cartodb,thorncp/cartodb,bloomberg/cartodb,thorncp/cartodb,splashblot/dronedb,codeandtheory/cartodb,splashblot/dronedb,bloomberg/cartodb,nuxcode/cartodb,bloomberg/cartodb,future-analytics/cartodb,dbirchak/cartodb,codeandtheory/cartodb,nyimbi/cartodb,future-analytics/cartodb,UCL-ShippingGroup/cartodb-1,UCL-ShippingGroup/cartodb-1