message: fix timescale crosshair label bug
  The text for the timescale crosshair label could appear when even if the coordinate was NaN.
diff: @@ -62,7 +62,7 @@ export class CrosshairTimeAxisView implements ITimeAxisView {
  data.width = timeScale.width();
  const value = this._valueProvider();
  - if (!value.time) {
  + if (!value.time || Number.isNaN(value.coordinate)) {
  return;
  }
  