API: Events: Implement the 'redraw:update_line' event
API: Events: Implement the 'redraw:status_line' event
API: Events: Implement the 'redraw:ruler' event
API: Events: Implement the 'redraw:layout' event
API: Events: Implement the 'redraw:cursor' event
API: Implement vim_redraw_screen to force redraw events