CRM-13331 - limited approach to preventing double click to double-send
add new line
minor changes per Coleman's comment
code style change from @colemanw
Merge branch 'CRM-13331' of https://github.com/eileenmcnaughton/civicrm-core into CRM-13331
fix js typo CRM-13331

----------------------------------------
* CRM-13331: emails can be 'double-sent' from search action
  http://issues.civicrm.org/jira/browse/CRM-13331