closeBottomSheet<T>  method 
Closes bottom sheet that are currently open.
id is for when using nested navigation.
Implementation
void closeBottomSheet<T>({String? id, T? result}) {
  // Stop if there is no bottomsheet open
  if (isBottomSheetOpen == null || !isBottomSheetOpen!) return;
  closeOverlay(id: id, result: result);
}