CRM-12717 Improve title of Miscellaneous system setting menu item and handle in upgrade.

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* CRM-12717:
  http://issues.civicrm.org/jira/browse/CRM-12717
Merge pull request #1215 from davecivicrm/CRM-12717

CRM-12717 Improve title of Miscellaneous system setting menu item and ha...