CRM-12923 - jobtabapp - Display warnings about unsaved changes when navigating to another browser page
CRM-12923 - jobtabapp - Move navigation code to its own module
CRM-12923 - jobtabapp - Put navigation helpers in their own namespace
CRM-12923 - jobtabapp/tree - Use navigation helper function
Merge pull request #64 from civicrm/master-nav-3

CRM-12923 - JobTabApp - Warning when navigating to new browser page