Fix trending hashtags screen not clearing selection

Tusker/Screens/Explore/TrendingHashtagsViewController.swift

@@ -11,11 +11,11 @@ import Pachyderm
 import WebURLFoundationExtras
 import Combine
 
-class TrendingHashtagsViewController: UIViewController {
+class TrendingHashtagsViewController: UIViewController, CollectionViewController {
 
     private let mastodonController: MastodonController
     
-    private var collectionView: UICollectionView!
+    private(set) var collectionView: UICollectionView!
     private var dataSource: UICollectionViewDiffableDataSource<Section, Item>!
     
     private var state = State.unloaded
@@ -84,6 +84,8 @@ class TrendingHashtagsViewController: UIViewController {
     override func viewWillAppear(_ animated: Bool) {
         super.viewWillAppear(animated)
         
+        clearSelectionOnAppear(animated: animated)
+        
         Task {
             await loadInitial()
         }

Tusker/Screens/Notifications/NotificationsCollectionViewController.swift

@@ -752,3 +752,16 @@ extension NotificationsCollectionViewController: StatusCollectionViewCellDelegat
         }
     }
 }
+
+extension NotificationsCollectionViewController: TabBarScrollableViewController {
+    func tabBarScrollToTop() {
+        collectionView.scrollToTop()
+    }
+}
+
+extension NotificationsCollectionViewController: StatusBarTappableViewController {
+    func handleStatusBarTapped(xPosition: CGFloat) -> StatusBarTapActionResult {
+        collectionView.scrollToTop()
+        return .stop
+    }
+}