[WIP] fix user specified JSON metadata not updating dashboard on refresh (#7027)
[WIP] fix user specified JSON metadata not updating dashboard on refresh (#7027)


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