WebSearch: display Discussion(N) in tab header
- Calculates number of comments and reviews for the given record and shows it in the "Discussion (N)" tab on detailed record page. (closes #475)
- Shows number of comments and reviews after clicking on this tab taking into account the comments and reviews deleted.
- Refactors code, creates function called "get_detailed_page_tabs_counts" in file "websearchadminlib.py".
- Deletes functions "count_commments(recID)" and "count_reviews(recID)" in file "webcomment.py" because they were not used in any module and they do the same funcionality that "get_nb_comments()" and "get_nb_reviews()" respectively.