Bug 17601 - Regression: Incomplete CSS update introduced by Bug 14610

Bug 17601 - Regression: Incomplete CSS update introduced by Bug 14610

Bug 14610 revised staff-global.css so that the "holdcount" class was
renamed "number_box." That's good. It's good to have something more
generic since the class is used in multiple places.

The problem is that there are still several instances of the "holdcount"
class in the templates which should have been updated at the same time
to say "number_box." Those instances are now unstyled.

Test Plan:
1) Apply this patch
2) Check that the holds count on catalogue/detail.pl is styled
3) Check that the patron modifications count on members/member.pl is styled
4) Check that the pending comments count on tools/tools-home.pl is styled
5) Check that the pending tags count on tools/tools-home.pl is styled

Signed-off-by: Chris Kirby <christopherlawrencekirby@gmail.com>
Signed-off-by: Katrin Fischer  <katrin.fischer@bsz-bw.de>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>