Delete TrackedApplication class.
Fix for possible issures with track toggle.
Remove SessionEnd, change SessionActive to NotMapped, move Cleanup call to MainWindow Closing handler.
Profiler.
Add AboutWindow.
Make ApplicationWindow apper in the middle of the screen.
Add hyperlink and automatic version to AboutWindow.
Disable Settings button, set default WindowState to Minimized and Visibility to Hidden.
Merge branch 'feature/misc-fixes-and-cleanup' into develop