Updated feature Enable token-based response persistence: silent save when "Resume later" is clicked
Dev If 'Enable token-based response persistence?' is 'Yes' there is no interaction required when clicking "Resume later". Responses are saved, an email is sent and respondent is returned to survey.
Dev saved response email has same URL as invitation/reminder email.

git-svn-id: file:///Users/Shitiz/Downloads/lssvn/source/limesurvey_dev@8913 b72ed6b6-b9f8-46b5-92b4-906544132732