Day label is drifting on the left when calendar range is getting smaller

[Winbee]

Version

4.4.0

Reproduction link

https://www.echartsjs.com/examples/en/editor.html?c=calendar-horizontal

Steps to reproduce

• Open the example https://www.echartsjs.com/examples/en/editor.html?c=calendar-horizontal
• Decrease the range of the first calendar like that:
  range: ['2017-01', '2017-04'],
  range: ['2017-01', '2017-03'],
  range: ['2017-01', '2017-02'],

What is expected?

The day label should remain at the same position.

What is actually happening?

The day label is moving further and and further on the left when we decrease the range.

[Winbee]

range: ['2017-01', '2017-04'],

range: ['2017-01', '2017-03'],

range: ['2017-01', '2017-02'],

[yufeng04]

It seems to be a bug!

[Nick22nd]

The issue as I tracking：

If orient is horizontal and range changes, the cell will automatically adjust its width.
But the weekly text margin is always equalling 50% width of cellSize.

I tried to fix it by making daylabel margin always be the cell's height .
It seems that the issue will be fixed. But I have 2 problem:

1. I don't know whether it will cause another issue.
2. I only changed 1 line code ,should I make a PR?