Added usecookies field to add / edit survey screen. Added 'status' message indicating whether usecookies is on on view survey details screen. Localised other status messages that had been missed in 0.98rc2.

git-svn-id: file:///Users/Shitiz/Downloads/lssvn/trunk/unstable@543 b72ed6b6-b9f8-46b5-92b4-906544132732