Uncomment signin validation test + test cleanup

closes #2989

- classing this as finishing the casper tests for now
- adding a name to the description in the settings template
Merge pull request #3061 from ErisDS/issue-2989

Uncomment signin validation test + test cleanup
Close notifications on transition or user action.

closes #3012
- Inject notification object into router
- Listen to didTransition / observe currentPath to close notifications
- Close notifications on successful save actions