[treemap] add row_limit control (#5811)
[treemap] add row_limit control (#5811)


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