message: Monitoring: Fix node detail page's Memory Usage graph
  This graph was not populated with any data because it was using the
  wrong metric name. `node_memory_Active_bytes` appears to be the correct
  metric.
diff: @@ -118,7 +118,7 @@ const NodeGraphs = requirePrometheus(({node}) => {
  return <React.Fragment>
  <div className="row">
  <div className="col-md-4">
  - <Line title="Memory Usage" query={ipQuery && `node_memory_Active${ipQuery}`} units="binaryBytes" limit={memoryLimit} />
  + <Line title="Memory Usage" query={ipQuery && `node_memory_Active_bytes${ipQuery}`} units="binaryBytes" limit={memoryLimit} />
  </div>
  <div className="col-md-4">
  <Line title="CPU Usage" query={ipQuery && `instance:node_cpu:rate:sum${ipQuery}`} units="numeric" limit={integerLimit(node.status.allocatable.cpu)} />
  