update dashboard
update dashboard

* visualize cluster state better
* visualize kafka lag
* use row headers for easy collapsing
* add idx skipped

raintank/metrictank,replay/metrictank,replay/metrictank,raintank/metrictank,raintank/raintank-metric,raintank/metrictank,replay/metrictank,raintank/raintank-metric,raintank/raintank-metric,replay/metrictank,raintank/metrictank