 			}()
 			
 			let navController = addNavControllerIfNecessary(controller, showButton: false)
-
-			masterTimelineViewController!.navigationItem.leftBarButtonItem = nil
-			
-			let subSplit = ensureDoubleSplit()
-			
-			let masterTimelineNavController = subSplit.viewControllers.first as! UINavigationController
-			masterTimelineNavController.viewControllers = [masterTimelineViewController!]
-
 			subSplit.showDetailViewController(navController, sender: self)
 			
 		}

			masterNavigationController.viewControllers = [masterFeedViewController]
		}

		if currentArticle == nil {
			
			let systemMessageViewController = UIStoryboard.main.instantiateController(ofType: SystemMessageViewController.self)
			let navController = addNavControllerIfNecessary(systemMessageViewController, showButton: false)


		} else {
			
			masterTimelineViewController!.navigationItem.leftBarButtonItem = nil
			
			let subSplit = ensureDoubleSplit()
			let masterTimelineNavController = subSplit.viewControllers.first as! UINavigationController
			masterTimelineNavController.viewControllers = [masterTimelineViewController!]

			let controller: UIViewController = {
				if let result = detailViewController {
					return result
