Bug 34269: Convert to using codes in select compares

Bug 34269: Convert to using codes in select compares

This patch updates the logic in smart rules to compare option values to
codes as apposed to option texts to value descriptions.

0. Apply patch
1. Install another language in the staff interface
   1. ./translate install xx-XX
   2. Check the box of the language in the 'language' system preference
   3. Refresh
2. Create an item type with a parent
   1. Go to Administration > Item types
   2. Create a new item type or modify an existing one, assigning a parent type
      Example: Create a 'Children's books' itemtypetype
      and assig 'Books' as its parent
   3. Create a third item type with the same description but something added in ():
      Example: 'Children's books (3-5)'
3. Create a circulation rule for the parent type
   Example: All/Books, with 2 checkouts allowed
4. Create a circulation rule for:
   All/All with 3 checkouts allowed
5. In English, click on "Edit" next to the parent type rule (All/Books)
   --> Note that the item type in the bottom row (the modifiable row) is changed to 'Books (All)'
6. Modify the number of checkouts allowed (e.g. 99)
   --> The All/Books rule is modified
7. Switch the interface to the other language
8. Click on "Edit" next to the parent type rule (All/Books)
   --> The All/Books rule is modified
9. Add rules for Children's books and Children's books (3-5)
10. Click on "Edit" next to each rule and change a value
   --> Verify that the changed values are always saved for the correct rule

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>