ui/ncurses: Handle arrow key variants

In the vt100 'application' cursor mode arrow keys produce ^[Ox rather
than the usual ^[[x. Add this pattern to our defined keys so we don't
accidentally catch the escape key.

For reference:
http://www.tldp.org/HOWTO/Keyboard-and-Console-HOWTO-21.html

Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>

ui/ncurses/nc-cui.c

@@ -98,8 +98,18 @@ static void cui_start(void)
 	define_key("\x1b\x4f\x46", KEY_END);
 	define_key("OH", KEY_HOME);
 	define_key("OF", KEY_END);
+
+	/* Arrow keys in normal cursor mode */
 	define_key("\x1b\x5b\x41", KEY_UP);
 	define_key("\x1b\x5b\x42", KEY_DOWN);
+	define_key("\x1b\x5b\x43", KEY_RIGHT);
+	define_key("\x1b\x5b\x44", KEY_LEFT);
+	/* Arrow keys in "application" cursor mode */
+	define_key("\x1b\x4f\x41", KEY_UP);
+	define_key("\x1b\x4f\x42", KEY_DOWN);
+	define_key("\x1b\x4f\x43", KEY_RIGHT);
+	define_key("\x1b\x4f\x44", KEY_LEFT);
+
 	define_key("\x1b\x5b\x33\x7e", KEY_DC);
 
 	while (getch() != ERR)		/* flush stdin */