perf ui: Make ui_browser__run exit on unhandled hot keys

Right now ENTER doesn't always exits the newt tree widget, as it is used
for expanding/collapsing branches, but with the new tree widget being
developed we need to regain control to handle it, expanding/collapsing
branches.

In fact its really up to the ui_browser user to state what extra keys
should stop ui_browser__run, and it should handle just the ones needed
for basic browsing.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/newt.c

@@ -498,12 +498,8 @@ static int ui_browser__run(struct ui_browser *self, struct newtExitStruct *es)
 			self->first_visible_entry_idx = self->index - offset;
 			self->seek(self, -offset, SEEK_END);
 			break;
-		case NEWT_KEY_RIGHT:
-		case NEWT_KEY_LEFT:
-		case NEWT_KEY_TAB:
-			return es->u.key;
 		default:
-			continue;
+			return es->u.key;
 		}
 		if (ui_browser__refresh_entries(self) < 0)
 			return -1;