Allows a view to update the navbar title if his title changes

Added a watch to see if the contents of the view title changes and, if so, fire an event to notify the navbar and update the title.

I've realized that if I want to update the view title with data from an async request it doesn't update. So, after searching the forums, I've tried to patch it myself. Is there a better way to do this? If not, consider my pull request.

Thanks for your time.