Menu: act on a single keypress instead of waiting for Enter

Also stops Enter from quitting the menu (it used to share the quit branch with
q) and swallows the tail of an escape sequence, so one arrow key redraws once
rather than three times and never closes the menu.

po/cachy-auto-update.pot

@@ -134,7 +134,7 @@ msgstr ""
 msgid "Quit"
 msgstr ""
 
-msgid "Press Enter to continue..."
+msgid "Press any key to continue..."
 msgstr ""
 
 #. Commands