[#53282857] forward current url params to language switcher

Squashed commit of the following:

commit 16c592f87ca7549a7ead7d628fc9cb85bb8394d2
Author: Sebastian Pape <email@sebastianpape.com>
Date:   Fri Jul 19 15:21:53 2013 +0200

    [#53282857] forward current url params to language switcher