Bug 16697: Translatability: Fix problem with isolated "'s"in request.tt

Bug 16697: Translatability: Fix problem with isolated "'s"in request.tt

This patch fixes translation problems with tag-isolated 's in
koha-tmpl/intranet-tmpl/prog/en/modules/reserve/request.tt

The patch fixes it at two places. In consequence, some other texts
ares sigthly changed to make them look similar.

To test:
- Inspect code changes and verify that the new wording makes sense.

Signed-off-by: Frédéric Demians <f.demians@tamil.fr>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>