fix the rest of #2318 editing/deleting comments in reports

Signed-off-by: Illori <illori@simplemachines.org>
remove moderate_forum perm
fix moderate_forum

Signed-off-by: Illori <illori@simplemachines.org>
Merge pull request #2329 from illori/edit-delete_comments

fix the rest of #2318 editing/deleting comments in reports