perf newt: Make <- exit the ui_browser

Right now that means that pressing the left arrow willl make the symbol
annotation window to exit back to the main symbol histogram browser.

This is another improvement on the UI fastpath, i.e. just the arrows and
enter are enough for most browsing.
Suggested-by: Ingo Molnar <mingo@elte.hu>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/newt.c

@@ -323,6 +323,7 @@ static int ui_browser__run(struct ui_browser *self, const char *title,
 	newtFormAddHotKey(self->form, NEWT_KEY_PGDN);
 	newtFormAddHotKey(self->form, NEWT_KEY_HOME);
 	newtFormAddHotKey(self->form, NEWT_KEY_END);
+	newtFormAddHotKey(self->form, NEWT_KEY_LEFT);
 
 	if (ui_browser__refresh_entries(self) < 0)
 		return -1;
@@ -408,6 +409,7 @@ static int ui_browser__run(struct ui_browser *self, const char *title,
 		}
 			break;
 		case NEWT_KEY_ESCAPE:
+		case NEWT_KEY_LEFT:
 		case CTRL('c'):
 		case 'Q':
 		case 'q':
@@ -616,7 +618,7 @@ static void hist_entry__annotate_browser(struct hist_entry *self)
 	if (hist_entry__annotate(self, &head) < 0)
 		return;
 
-	ui_helpline__push("Press ESC to exit");
+	ui_helpline__push("Press <- or ESC to exit");
 
 	memset(&browser, 0, sizeof(browser));
 	browser.entries = &head;