Bug 23483: Show the description, not the patron's title when writing off an individua...

Bug 23483: Show the description, not the patron's title when writing off an individual fine/fee

When writing off an individual fine, the description shown
was the patron's title, instead of the fine description.
Fixing it by changing it to the same template variable used for
paying individuals so they match up.

To test:
- Pick a patron and make sure salutation is set (Mr, Mrs, ...)
- Create a manual fine
- For the fine, compare the description shown when using the Writeoff
  and Pay buttons next to the fine
- Verify the display is different and writeoff displays the salutation
- Apply patch
- Repeat, descriptions now should match up

Signed-off-by: Séverine QUEUNE <severine.queune@bulac.fr>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>