Bug 22627: Renames OPAC fines tab to 'your charges' to be more inclusive

Bug 22627: Renames OPAC fines tab to 'your charges' to be more inclusive

Brought up on Bug 21578, the 'your fines' tab in the OPAC would be
better named as 'your charges' as not all charges are fines, some are
credits etc.

To test:
1) In the OPAC, click on the user's name and note that the tab that was called your fines is now called your charges.
2) When you click on the tab, the title says Your charges, the breadcrumb says Your
charges, and the table title is Your charges.

Sponsored-by: Catalyst IT.
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>