Initial version of Special:SearchTranslations

Change-Id: I760797515c7e7d6ce99a610f0c66bfc27043dbfb
Display proper language names and group names in search page

Change-Id: I9c0ca5bcf8dfb18f67056dfb63c1318eaf502bbd
Merge changes I9c0ca5bc,I76079751

* changes:
  Display proper language names and group names in search page
  Initial version of Special:SearchTranslations