message: Set fixedrange on line charts
  This disables pan on drag because there's no data outside the range we
  show in the line charts.
diff: @@ -29,12 +29,14 @@ export class Line extends BaseGraph {
  zeroline: false,
  ticks: '',
  showline: false,
  + fixedrange: true,
  },
  xaxis: {
  zeroline: false,
  tickformat:'%H:%M',
  ticks: '',
  showline: false,
  + fixedrange: true,
  },
  legend: {
  x: 0, y: 1,
  