Idlelock timer reset notification

[simonLeary42]

• added a confirmation message when the inactivity timer is reset and the user /may have been/ notified by email
  • if they reach exactly N days idle at 2PM, and they login at 3PM, and user-expiry.php won't run until tomorrow at 2AM, then the user will get a confirmation message despite not having been emailed
  • this message is mutually exclusive with the "idlelock removed" message, and cannot be sent if the user is disabled
• added a function convertLastLoginToIdleDays so that there can be no discrepancies between the logic of user-expiry.php and the confirmation message in init.php
• moved the locked group enforcement to header.php next to the disabled group enforcement
• updated the test cases for locked group enforcement to run on all pages
• fixed a bug where a disabled user can get an "idle unlocked" confirmation message
• refactored test files, so instead of (ExpiryTest ExpiryApiTest IdleUnlockTest) we now have (ExpiryWorkerTest ExpiryApiTest ExpiryGuiTest)