Navigation Status and Persistence

I have just finished a series of refactorings related to navigation. It enables me to move forward easier for more navigation-related features like the two below :

Navigation Status

The selected navigation is now appear on status bar. It is most useful in the case that Navigation Panel is in auto-hide state to get a hint on what navigation the currently-listed tasks are.

 

Navigation Persistence

The selected navigation also now persistent. So, when the application close and later opened it will come back with the last selected navigation loaded.