Allow attachment thumbnails from REST API (#18707).

git-svn-id: http://svn.redmine.org/redmine/trunk@13806 e93f8b46-1217-0410-a6f0-8f06a7374b81
Force UTF-8 encoding of language names.

git-svn-id: http://svn.redmine.org/redmine/trunk@13807 e93f8b46-1217-0410-a6f0-8f06a7374b81
Converts timestamps to integers in #search_result_ranks_and_ids.

git-svn-id: http://svn.redmine.org/redmine/trunk@13811 e93f8b46-1217-0410-a6f0-8f06a7374b81
Updates comments for r13811.

git-svn-id: http://svn.redmine.org/redmine/trunk@13812 e93f8b46-1217-0410-a6f0-8f06a7374b81
Fixed duplicate content_url tag introduced in r13806 (#18707).

git-svn-id: http://svn.redmine.org/redmine/trunk@13813 e93f8b46-1217-0410-a6f0-8f06a7374b81
Preload wiki page content for search results.

git-svn-id: http://svn.redmine.org/redmine/trunk@13814 e93f8b46-1217-0410-a6f0-8f06a7374b81