message: Update cluster health to use more accurate queries for CPU usage.
diff: @@ -51,10 +51,10 @@ export const ClusterHealth = () => <div>
  <div className="cluster-overview-cell co-m-pane">
  <div className="row">
  <div className="col-lg-3 col-md-6">
  - <Gauge title="CPU Usage" query={'sum(rate(node_cpu{mode!="idle"}[2m])) * 100'} />
  + <Gauge title="CPU Usage" query={'100 - (sum(rate(node_cpu{job="node-exporter",mode="idle"}[2m])) / count(node_cpu{job="node-exporter", mode="idle"})) * 100'} />
  <div className="row">
  <div className="col-xs-6">
  - <Scalar title="Used Cores" unit="numeric" query={'cluster:node_cpu:sum_rate5m * sum(machine_cpu_cores)'} />
  + <Scalar title="Used Cores" unit="numeric" query={'(1 - sum(rate(node_cpu{job="node-exporter",mode="idle"}[2m])) / count(node_cpu{job="node-exporter", mode="idle"})) * sum(machine_cpu_cores)'} />
  </div>
  <div className="col-xs-6">
  <Scalar title="Total Cores" unit="numeric" query={'sum(machine_cpu_cores)'} />
  