[bug report] datetimepicker date time selector - date and time point - the default component operates in this version of edge browser to make the browser stuck until the page restarts

### Element UI version
2.4.7

### OS/Browsers version
win10 edge浏览器版本 Microsoft Edge 44.17763.831.0 Microsoft EdgeHTML 18.17763

### Vue version
2.6.10

### Reproduction Link
https://codepen.io/lanjingling072/pen/BaNLgBR

### Steps to reproduce
v2.0~2.13在edge 都有问题。
点击页面上该组件，弹出日期时间选择框，点击选择时间栏，会将当前时间填充，然后点击页面空白处，多次操作即会出现问题现象

### What is Expected?
不卡死

### What is actually happening?
卡死