perf ordered_events: Clear the progress bar at the end of a flush

We were depending on the next screen operation after a flush() being
one that would redraw the whole screen so that the progress bar would
be overwritten, when that didn't happen a screen artifact of, say, a
error dialog window would be overlaid on top of the progress bar, fix
it by calling ui_browser__finish(), that now has a TUI implementation.

Cc: Adrian Hunter <[e-mail]>
Cc: Borislav Petkov <[e-mail]>
Cc: David Ahern <[e-mail]>
Cc: Frederic Weisbecker <[e-mail]>
Cc: Jiri Olsa <[e-mail]>
Cc: Namhyung Kim <[e-mail]>
Cc: Stephane Eranian <[e-mail]>
Link: http://lkml.kernel.org/n/[e-mail]
Signed-off-by: Arnaldo Carvalho de Melo <[e-mail]>

tools/perf/util/ordered-events.c

···
 	else if (last_ts <= limit)
 		oe->last = list_entry(head->prev, struct ordered_event, list);
 
+	if (show_progress)
+		ui_progress__finish();
+
 	return 0;
 }