 			masterNavigationController.viewControllers = [masterFeedViewController]
 		}
 		
+		configureDoubleSplit()
 		installTimelineControllerIfNecessary(animated: false)
 		
 		let controller: UIViewController = {

	
	func installDetailController(_ detailController: UIViewController, automated: Bool) {

		if isThreePanelMode {
			let controller = addNavControllerIfNecessary(detailController, showButton: false)
			let targetSplit = ensureDoubleSplit().children.first as! UISplitViewController
			targetSplit.showDetailViewController(controller, sender: self)
		} else if rootSplitViewController.isCollapsed {
			let controller = addNavControllerIfNecessary(detailController, showButton: false)
			masterNavigationController.pushViewController(controller, animated: !automated)

		shimController.addChildAndPinView(subSplit)
		
		rootSplitViewController.showDetailViewController(shimController, sender: self)
	}
	
	func navControllerForTimeline() -> UINavigationController {
		if let subSplit = subSplitViewController {
			return subSplit.viewControllers.first as! UINavigationController
		} else {
			return masterNavigationController
