CRM-12994 fix and web test

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* CRM-12994: Premiums Section disabled, yet asking for No Thank You Title
  http://issues.civicrm.org/jira/browse/CRM-12994
* CRM-12695-1:
  http://issues.civicrm.org/jira/browse/CRM-12695-1
* CRM-12695: Membership sharing doesn't work after merge
  http://issues.civicrm.org/jira/browse/CRM-12695
Merge pull request #1260 from aadityawalawalkar/CRM-12994

CRM-12994 fix and web test