message: Fix ecomfe/echarts#6195 (symbol can not be removed when hover)
diff: @@ -202,10 +202,13 @@ define(function (require) {
  */
  dispatchToElement: function (targetInfo, eventName, event) {
  targetInfo = targetInfo || {};
  + var el = targetInfo.target;
  + if (el && el.silent) {
  + return;
  + }
  var eventHandler = 'on' + eventName;
  var eventPacket = makeEventPacket(eventName, targetInfo, event);
  - var el = targetInfo.target;
  while (el) {
  el[eventHandler]
  && (eventPacket.cancelBubble = el[eventHandler].call(el, eventPacket));
  