Fix EZP-23483: Additional fix for languageswitcher redirection

Additional fix for https://jira.ez.no/browse/EZP-23483

When performing redirect from language switcher, fetch url alias according to the prioritized languages of the destination siteaccess.
In addition, properly adjust path when an urlalias is found on the wanted language(s).
Nitpick: This is copied from above, but ending with a comma makes no sense in this case since there is no other comment following it.

Otherwise +1