defaultSort should be false when no sort is necessary (#3693)
defaultSort should be false when no sort is necessary (#3693)


alanmcruickshank/superset-dev,airbnb/caravel,alanmcruickshank/superset-dev,airbnb/superset,airbnb/caravel,timifasubaa/incubator-superset,dmigo/incubator-superset,dmigo/incubator-superset,mistercrunch/panoramix,alanmcruickshank/superset-dev,apache/incubator-superset,airbnb/caravel,dmigo/incubator-superset,airbnb/superset,zhouyao1994/incubator-superset,alanmcruickshank/superset-dev,zhouyao1994/incubator-superset,mistercrunch/panoramix,mistercrunch/panoramix,apache/incubator-superset,timifasubaa/incubator-superset,zhouyao1994/incubator-superset,mistercrunch/panoramix,apache/incubator-superset,apache/incubator-superset,timifasubaa/incubator-superset,airbnb/superset,airbnb/caravel,airbnb/superset,zhouyao1994/incubator-superset,zhouyao1994/incubator-superset,apache/incubator-superset,timifasubaa/incubator-superset,dmigo/incubator-superset