A bug introduced in commit 7d7e0793

 (Hide the table sorting links on the
dashboard, 2017-02-04) resulted in multiple clicks on a table heading in
the package search results table no longer having any effect, instead of
changing the sorting order. Fix this by removing erroneous spaces from
the GET parameters in the search URL.

Fixes FS#56261.

Signed-off-by: Lukas Fleischer <lfleischer@archlinux.org>