Fixed issue #04256: Having too many timer questions completely kills the session - new cookies.js allows for the use of "sub" cookies meaning all LS timer cookies are in one single cookie

git-svn-id: file:///Users/Shitiz/Downloads/lssvn/source/limesurvey@8579 b72ed6b6-b9f8-46b5-92b4-906544132732