fix(filterbox): fixed  runtime exception in filterbox for allow multiple selection is false (#7011)
fix(filterbox): fixed  runtime exception in filterbox for allow multiple selection is false (#7011)


mistercrunch/panoramix,zhouyao1994/incubator-superset,zhouyao1994/incubator-superset,apache/incubator-superset,apache/incubator-superset,airbnb/superset,apache/incubator-superset,zhouyao1994/incubator-superset,apache/incubator-superset,airbnb/superset,airbnb/superset,airbnb/caravel,mistercrunch/panoramix,mistercrunch/panoramix,zhouyao1994/incubator-superset,airbnb/caravel,apache/incubator-superset,mistercrunch/panoramix,airbnb/caravel,airbnb/superset,zhouyao1994/incubator-superset,airbnb/caravel