[bp/r52052][FIX] comments: Provide feedback when comment posted needs moderating, sadly as an ugly alert dialog (for now, TODO better one day) - thanks Xavi
[bp/r52054][FIX] comments: canModerate returns false if the feature is off, so check pref first. Thanks jonnyb

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@52114 b456876b-0849-0410-b77d-98878d47e9d5