[Bug] 圆角边框有两层

[xiafrog]

Version

1.7.2

Link to Minimal Reproduction

https://visactor.io/vtable/guide/table_type/Pivot_table/pivot_table_useage

Steps to Reproduce

theme: VTable.themes.DEFAULT.extends({ 
    frameStyle: {
      cornerRadius: 6
    },
    cellInnerBorder: false
  })

Current Behavior

Expected Behavior

只有一层边框

Environment

- OS:
- Browser:
- Framework:

Any additional comments?

No response