[FIX]Improve feedback to poster (when anonymous) in the case of comments moderation enabled. Fixes http://dev.tiki.org/item5310 . However, there is still some missing feedback when the poster is a registered user (comment just dissapears after clicking at "post" and no feedback to the user).

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/13.x@51991 b456876b-0849-0410-b77d-98878d47e9d5