message: sequence widget help icon
diff: @@ -167,7 +167,8 @@ export class Sequence<P extends SequenceProps> extends PluginUIComponent<P> {
  let o = 0;
  for (let i = 0, il = markerArray.length; i < il; i++) {
  if (hasNumbers && i % period === 0 && i < il) o++;
  - const span = xs[o] as HTMLSpanElement;
  + // o + 1 to account for help icon
  + const span = xs[o + 1] as HTMLSpanElement;
  if (!span) return;
  o++;
  @@ -243,6 +244,7 @@ export class Sequence<P extends SequenceProps> extends PluginUIComponent<P> {
  onMouseLeave={this.mouseLeave}
  ref={this.parentDiv}
  >
  + <span className={`msp-icon msp-icon-help`} style={{ cursor: 'help' }} title='This shows a single sequence. Use the menu on the left to show a different sequence.' />
  {elems}
  </div>;
  }
  