feat(MessageService): Manually control when to close message and update message content

[syminomega]

Is there an existing issue for this?

• I have searched the existing issues

Is your feature request related to a problem? Please describe the problem.

I want to update the current message witch has not been closed, and then I want to close the message through the code.

Describe the solution you'd like

var msgOption = new MessageOption(){
  Id="loadingMsg",
  Content="Downloading...",
  Color= Color.Info
// do not autoHide
}
// do not use the await to block
_ = MessageService.ShowAsync(msgOption);
// my download processing
// update message after download
msgOption.Content="loading finished!";
msgOption.Color=Color.Success;
msgOption.IsAutoHide = true;
// update the previous message, and wait until close
await MessageService.ShowAsync(msgOption);

Additional context

No response

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