Bug 17074: Follow-up: fixing encoding issues with multiple search terms

Bug 17074: Follow-up: fixing encoding issues with multiple search terms

If there was more than one search term you could see that that it
was url encoded. Also problems with search terms with umlauts and
other diacritics.

Patch should fix that.

https://bugs.koha-community.org/show_bug.cgi?id=17074
Signed-off-by: Marc <veron@veron.ch>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>