Bug 22616: Updating error text messages

Bug 22616: Updating error text messages

To test:

Apply this patch
Go to a borrower that doesn't exist, check that the error message is
displayed and looks correct. (i.e. http://127.0.0.1:8081/cgi-bin/koha/members/moremember.pl?borrowernumber=9999999999999999)
Go to an item, subscription, biblio that don't exist, check that the
error message is correct and the links work
Go to a borrower that the logged in user doesn't have permission to see, check that the error message is correct and the links work.

Signed-off-by: Bin Wen <bin.wen@inlibro.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>