message: sequence widget, bind onMouseLeave
diff: @@ -156,6 +156,7 @@ export class Sequence<P extends SequenceProps> extends PluginUIComponent<P> {
  onContextMenu={this.contextMenu}
  onMouseDown={this.mouseDown}
  onMouseMove={this.mouseMove}
  + onMouseLeave={this.mouseLeave}
  ref={this.parentDiv}
  >
  {elems}
  