[bugfix] big_number doesn't fadeout on hover
[bugfix] big_number doesn't fadeout on hover

zhouyao1994/incubator-superset,zhouyao1994/incubator-superset,apache/incubator-superset,nekia/incubator-superset-dev,airbnb/superset,dmigo/incubator-superset,nekia/incubator-superset-dev,georgeke/caravel,timifasubaa/incubator-superset,SingTel-DataCo/incubator-superset,woel0007/caravel,mistercrunch/panoramix,FrederichCheng/incubator-superset,timifasubaa/incubator-superset,apache/incubator-superset,FrederichCheng/incubator-superset,giaosudau/caravel,asdf2014/superset,tienhv/caravel,dmigo/incubator-superset,jeromecn/caravel_viz_full,airbnb/superset,massgov/incubator-superset,asdf2014/superset,timifasubaa/incubator-superset,BRD-CD/superset,ArijanaBrlek/superset,airbnb/caravel,massgov/incubator-superset,apache/incubator-superset,jeromecn/caravel_viz_full,woel0007/caravel,giaosudau/caravel,francisliyy/caravel-aidp,SingTel-DataCo/incubator-superset,SingTel-DataCo/incubator-superset,alanmcruickshank/superset-dev,francisliyy/caravel-aidp,tienhv/caravel,ArijanaBrlek/superset,airbnb/superset,giaosudau/caravel,francisliyy/caravel-aidp,jeromecn/caravel_viz_full,SingTel-DataCo/incubator-superset,airbnb/superset,alanmcruickshank/superset-dev,nekia/incubator-superset-dev,giaosudau/caravel,wbsljh/caravel,francisliyy/caravel-aidp,ArijanaBrlek/superset,asdf2014/superset,timifasubaa/incubator-superset,FrederichCheng/incubator-superset,zhouyao1994/incubator-superset,BRD-CD/superset,georgeke/caravel,woel0007/caravel,nekia/incubator-superset-dev,apache/incubator-superset,massgov/incubator-superset,dmigo/incubator-superset,ArijanaBrlek/superset,georgeke/caravel,wbsljh/caravel,FrederichCheng/incubator-superset,robert-digit/superset,BRD-CD/superset,dmigo/incubator-superset,robert-digit/superset,wbsljh/caravel-aidp,mistercrunch/panoramix,apache/incubator-superset,airbnb/caravel,wbsljh/caravel-aidp,zhouyao1994/incubator-superset,massgov/incubator-superset,tienhv/caravel,mistercrunch/panoramix,BRD-CD/superset,woel0007/caravel,airbnb/caravel,tienhv/caravel,jeromecn/caravel_viz_full,alanmcruickshank/superset-dev,mistercrunch/panoramix,airbnb/caravel,wbsljh/caravel-aidp,alanmcruickshank/superset-dev,robert-digit/superset,zhouyao1994/incubator-superset,wbsljh/caravel-aidp,robert-digit/superset,asdf2014/superset,georgeke/caravel,wbsljh/caravel,wbsljh/caravel