[Bug] Legend do not break in VisualMap piecewise option

[JonasHass]

Version

5.3.3

Link to Minimal Reproduction

https://echarts.apache.org/examples/en/editor.html?c=calendar-heatmap

Steps to Reproduce

Hi, I was trying to use VisualMap with piecewise option, however, not all the legends are visible, see the image below:

Is it possible to auto break the legend, or manually define the number of columns?

Current Behavior

The VisualMap legend does not fit into the screen.

Expected Behavior

Automatically break the legend if doesn't fit.

Environment

- OS:Android
- Browser: Chrome 
- Framework:

Any additional comments?

No response

[Ovilia]

Currently, there is no way to do this.

[MeMeMax]

Here is a reproduction if anyone needs it: https://jsfiddle.net/90y1oc4x/