Make sure the activity is NOT destroyed when trying to show the notification details screen.
Make sure isDestroyed is called on API 17+, and make sure super.onCreate is not called with null parameter in CommentsActivity and NotificationsActivity.
Move isDestroyed() to a separate routine
Merge pull request #1372 from wordpress-mobile/issue/1370-crash-when-opening-notification

Fixing IllegalStateException when opening Notification details from PN