reused existing searchbar.php to avoid code duplication

git-svn-id: http://svn.montala.net/svn/resourcespace@4554 c08608d7-6e46-0410-86ca-f2a6f1370df5
changed tabs style for white/gray theme to be more similar to other themes

git-svn-id: http://svn.montala.net/svn/resourcespace@4555 c08608d7-6e46-0410-86ca-f2a6f1370df5