Fix EZP-23822: PathPrefix still present when using ezpLanguageSwitcher

Languageswitcher redirection special case when redirecting to the value of pathprefix (mysite.com/myPathPrefix)

EzpLanguageSwitcher: Removing unrelevant params

Adding extra spaces
Merge pull request #1128 from yannoz/master

Fix EZP-23822: PathPrefix in ezpLanguageSwitcher