Resize all the colummns to its contents.

def _resizeColumnsToContents(self, header, data, limit_ms):
        """Resize all the colummns to its contents."""
        max_col = data.model().columnCount()
        if limit_ms is None:
            max_col_ms = None
        else:
            max_col_ms = limit_ms / max(1, max_col)
        for col in range(max_col):
            self._resizeColumnToContents(header, data, col, max_col_ms)