Bug 23115: Tweak display of totals on 'Fines and charges' page

Bug 23115: Tweak display of totals on 'Fines and charges' page

This patch tweaks the display of totals on the OPAC 'Fines and charges'
page to clarify between the totals before and after applying credits.

Test Plan:
1) Add some debts and credits to a patrons account
2) Look at the 'Fines and charges' page before applying the patch
3) Look at the 'Fines and charges' page after applying the patch
4) Varify the new layout is an improvment or not

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Nadine Pierre <nadine.pierre@inLibro.com>
Signed-off-by: Maryse Simard <maryse.simard@inlibro.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>