Fixed EZP-21785: eZ Find, optionally search content in multiple languages in the admin SiteAccess
Re-added SiteLanguageList logic and in addition take into account ShowUntranslatedObjects as suggested by @andrerom
Added always_available translation filter expression to language filter build method
Merge pull request #137 from ezsystems/issue-21785-mulilanguage-search-admin

Fixed EZP-21785: eZ Find, optionally search content in multiple language...