Bug 30517: Translation breaks editing parent type circulation rule fix

Bug 30517: Translation breaks editing parent type circulation rule fix

Test plan:
1. Install another language in the staff interface
   1. in commandline: `cd misc/translator/; ./translate install xx-XX`
   2. Check the box of the language in the 'language' system preference
and save
   3. Refresh and you should be able to choose languages
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 (I created a 'Children's books' type and assigned 'Books' as its parent)
3. Create a circulation rule for the parent type (I created All/Books, with 10 checkouts allowed)
4. Create a circulation rule for All/All (I created All/All with 30 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)
--> Note that the item type in the bottom row stays on 'All'
9. Modify the number of checkouts allowed (e.g. 88)
--> The All/All rule is modified
10. Apply the patch, translate again and refresh the page
11. Do step 8-9 again and notice it now behaves as it should

Signed-off-by: Emmanuel Bétemps <e.betemps@gmail.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>