Added auto-calculation of next in order of sortorder for new answers. (ie: If the current last item has a sortorder of 'c', a 'new' answer will have a sort order of 'D')

git-svn-id: file:///Users/Shitiz/Downloads/lssvn/trunk/unstable@391 b72ed6b6-b9f8-46b5-92b4-906544132732