Fix VC restored to secondary split nav missing Close button

Tusker/Screens/Search/SearchResultsViewController.swift

@@ -80,9 +80,8 @@ class SearchResultsViewController: UIViewController, CollectionViewController {
                 break
             }
             let section = NSCollectionLayoutSection.list(using: config, layoutEnvironment: environment)
-            if UIDevice.current.userInterfaceIdiom == .pad || UIDevice.current.userInterfaceIdiom == .mac {
-                section.contentInsetsReference = .readableContent
-            }
+            // we don't use the readable content inset here, because it insets the entire cell, rather than just the content
+            // so the cell backgrounds not being full width looks weird
             return section
         }
         view = UICollectionView(frame: .zero, collectionViewLayout: layout)

Tusker/Screens/Utilities/SplitNavigationController.swift

@@ -304,6 +304,12 @@ private class SplitSecondaryNavigationController: EnhancedNavigationViewControll
         }
     }
     
+    override func pushViewController(_ viewController: UIViewController, animated: Bool) {
+        super.pushViewController(viewController, animated: animated)
+        
+        configureSecondarySplitCloseButton(for: viewControllers.first!)
+    }
+    
     private func configureSecondarySplitCloseButton(for viewController: UIViewController) {
         guard viewController.navigationItem.leftBarButtonItem?.tag != ViewTags.splitNavCloseSecondaryButton else {
             return

Tusker/Views/TrendHistoryView.swift

@@ -48,6 +48,9 @@ class TrendHistoryView: UIView {
         }
         
         let maxUses = history.max(by: { $0.uses < $1.uses })!.uses
+        guard maxUses > 0 else {
+            return
+        }
         
         // remove old layers if this view is being re-used
         layer.sublayers?.forEach { $0.removeFromSuperlayer() }