Bug 12166: Improve display of Reserve charges in patron account

Bug 12166: Improve display of Reserve charges in patron account

This patch makes changes to the way hold fees are recorded and displayed
in the OPAC and staff client:

 - No English strings should be stored in the accountline description.
 - The accounttype code should be used to display what kind of charge it
   is.

To test, apply the patch and go to the staff client:

 - Configure a patron category to have a hold fee.
 - Place one or more holds for a patron in that category.
 - On the patron's record, view Accounting -> Make a payment
   - There should be a separate column for "Account type" showing "Hold
     fee" for the hold charges.
   - There should be no "Res" or "Reserve Charge" text in the
     description column--just the title.
 - Switch to the "Transactions" tab. The display should be similar.
 - In the OPAC, log in as a patron who has hold fees on their account.
   - View the "your fines" page to confirm that the information is
     displayed correctly there as well.

 - Place a hold for a patron who incurs hold charges.
 - Log in to the self-checkout module as that patron and check out an
   item which will fulfill that hold.
 - The correct fine information should be saved to accountlines: A "Res"
   type with a description consisting only of the title.

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>