JackHlw

https://github.com/apache/incubator-echarts/pull/13833

🥰 [FEATURE] Tooltip 组件容器支持添加到body

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目前 Tooltip 组件默认添加到地图容器内，容器太小时，会出现遮挡问题，是否可以支持添加到body节点？

🤔 高级图表中图例不显示问题，直接使用dot是可以展示的

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### 🐛 Question description [Please make everyone to understand it] ### 💻 Link to minimal reproduction Please provide a link by forking these links [L7Plot](https://codesandbox.io/s/l7plot-issue-template-ckpvq?file=/src/index.ts) or GitHub repo. What is...