Improvement FloatingDateDivider behavior in StreamMessageListView.

[NiyazFazlyev]

Please select which package this feature is related to

stream_chat_flutter

Which platforms would this feature impact?

iOS, Android

Is your feature request related to a problem?

When scrolling MessagesList and date divider reach floating date divider, they overlap each other. It doesn't look cool.

Describe the solution that you'd like

I would suggest looking at the implementations in Whatsapp or Telegram.

Describe alternatives that you have considered

No response

Additional context

Code of Conduct

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