Bug 2093: (follow-up) Add OPAC dashboard for logged-in users

Bug 2093: (follow-up) Add OPAC dashboard for logged-in users

This patch:
- hides the dashboard if there is no dashboard information to display
- changes '5.00 due' to '5.00 due in fines and charges' for translation
- uses Koha::Holds in place of deprecated C4::Reserves methods

To test, confirm all the right information for holds still shows, and
confirm the dashboard is hidden if there are no checkouts, holds, fines
or overdues.

Signed-off-by: Hugo Agud <hagud@orex.es>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>