Extra menu traversal options

[mango-habanero]

Due to an oversite in the feedback translations:

The voucher selection menu options were shipping with extra options that weren't necessary:

Select number or symbol from your vouchers:
No more vouchers available.
22. Back
00. Exit
11. Next
22. Back
00. Exit

This should be:

Select number or symbol from your vouchers: No more vouchers available.

11. Next
12. Back
13. Exit