CRM-13600 CiviMail form - allow CiviMails from advanced search for users with no group view permissions (ACL hook based permissions)

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* CRM-13600: Contacts with access to no mailing groups cannot do search based CiviMails
  http://issues.civicrm.org/jira/browse/CRM-13600
Merge pull request #1838 from eileenmcnaughton/CRM-13600

CRM-13600 CiviMail form - allow CiviMails from advanced search for users...