Switched to enum for WeblogEntryComment approval status; changed effect of Admin un-spamming a comment to that of disapproval instead of approval; removed no spam search option until properly implemented (via checkbox or multi-select list) as it doesn't work well with enums.

git-svn-id: https://svn.apache.org/repos/asf/roller/trunk@1604929 13f79535-47bb-0310-9956-ffa450edef68