BUG 18505: opac-search-history does not respect opacPublic

BUG 18505: opac-search-history does not respect opacPublic

The opac-search-history page was available regardless of the opacPublic setting, this
patch corrects that.

Test plan, set opacPublic to 'No', test whether opac-search-history page is available
when not logged in, note that it is.
Apply patch, test whether opac-search-history is still available when not logged in,
note that you should be redirected to the login page.

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Mason James <mtj@kohaaloha.com>