Ability to customize styles for List.Item["extra"]

[alisher-aituarov]

What problem does this feature solve?

extra element wrapper gets margin-bottom added when sm breakpoint is hit. Which is unnecessary

What does the proposed API look like?

type List.Item = {
      // here all ListItem props
      styles: {
            extra: CSSProperties
      }
}

[wanpan11]

I will try to add it 🧐