Sets column width and marks grid as changed

def set_col_width(self, col, width):
        """Sets column width and marks grid as changed"""

        # Mark content as changed
        post_command_event(self.main_window, self.ContentChangedMsg)

        tab = self.grid.current_table

        self.code_array.set_col_width(col, tab, width)
        self.grid.SetColSize(col, width)