display file extension in search

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1526878 13f79535-47bb-0310-9956-ffa450edef68
missing i18n

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1526879 13f79535-47bb-0310-9956-ffa450edef68
fix missing th

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1526880 13f79535-47bb-0310-9956-ffa450edef68