Bug 42750: Add redirect params back and exit after redirect

To test:
1. Find a patron
2. From the patron account click the "Purchase suggestions" button
3. Make a suggestion
4. Your are redirected to suggestion/suggestion.pl
5. APPLY PATCH, restart_all
6. Try again, this time you should be properly redirected back to the patron account: ( members/purchase-suggestions.pl?borrowernumber=X )

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Martin Renvoize <martin.renvoize@openfifth.co.uk>
Signed-off-by: Pedro Amorim <pedro.amorim@openfifth.co.uk>

suggestion/suggestion.pl

@@ -273,6 +273,7 @@ if ( $op =~ /cud-save/ ) {
 
         if ( $redirect eq 'purchase_suggestions' ) {
             print $input->redirect("/cgi-bin/koha/members/purchase-suggestions.pl?borrowernumber=$borrowernumber");
+            exit;
         }
     }
 } elsif ( $op eq 'add_form' ) {
@@ -517,6 +518,7 @@ $template->param(
     filter_archived => $filter_archived,
     "op"            => $op,
     reasonsloop     => $reasonsloop,
+    redirect        => $redirect,
 );
 
 if ( defined($returnsuggested) and $returnsuggested ne "no_one" ) {