XWIKI-7144: Quick search results should not include attachmets if their parent's page contains the search term
- Using the "filename" (instead of "name") and the "ft" (instead of all the fields) to properly suggest attachments
- Slightly updated the page with the latest changes in the class
(cherry picked from commit 698d0ffd9f89aeb4a9e8fc74df874d726e236e92)